{"id":239786,"date":"2025-07-03T04:53:18","date_gmt":"2025-07-03T04:53:18","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=239786"},"modified":"2025-07-03T04:53:20","modified_gmt":"2025-07-03T04:53:20","slug":"a-15000-square-foot-commercial-office-building-uses-35000-kwh-per-month-and-has-a-peak-demand-of-150-kw","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/03\/a-15000-square-foot-commercial-office-building-uses-35000-kwh-per-month-and-has-a-peak-demand-of-150-kw\/","title":{"rendered":"A 15,000-square-foot commercial office building uses 35,000 kWh per month and has a peak demand of 150 kW"},"content":{"rendered":"\n

A 15,000-square-foot commercial office building uses 35,000 kWh per month and has a peak demand of 150 kW. Estimate the monthly electric bill and the annual electric cost.<\/p>\n\n\n\n

The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n

To estimate the monthly electric bill and the annual electric cost, we need to take into account both the energy consumption (measured in kilowatt-hours, kWh) and the demand charges (measured in kilowatts, kW).<\/p>\n\n\n\n

Monthly Electric Bill<\/h3>\n\n\n\n

For many commercial buildings, the electric bill consists of two major components:<\/p>\n\n\n\n

    \n
  1. Energy Charges<\/strong>: These are based on the total energy consumed, usually priced per kWh.<\/li>\n\n\n\n
  2. Demand Charges<\/strong>: These are based on the peak demand in kilowatts, typically charged at a fixed rate per kW.<\/li>\n<\/ol>\n\n\n\n

    We can estimate the total electric bill using the following steps:<\/p>\n\n\n\n

      \n
    1. Energy Charges<\/strong>:
      The building uses 35,000 kWh per month. Assuming an average cost of $0.10 per kWh for energy usage: Energy\u00a0Charge=35,000\u2009kWh\u00d70.10\u2009USD\/kWh=3,500\u2009USD\/month\\text{Energy Charge} = 35,000 \\, \\text{kWh} \\times 0.10 \\, \\text{USD\/kWh} = 3,500 \\, \\text{USD\/month}<\/li>\n\n\n\n
    2. Demand Charges<\/strong>:
      The building has a peak demand of 150 kW. Assuming the demand charge is $15 per kW per month: Demand\u00a0Charge=150\u2009kW\u00d715\u2009USD\/kW=2,250\u2009USD\/month\\text{Demand Charge} = 150 \\, \\text{kW} \\times 15 \\, \\text{USD\/kW} = 2,250 \\, \\text{USD\/month}<\/li>\n<\/ol>\n\n\n\n

      Thus, the monthly electric bill<\/strong> is the sum of these two charges: Monthly Bill=3,500\u2009USD+2,250\u2009USD=5,750\u2009USD\/month\\text{Monthly Bill} = 3,500 \\, \\text{USD} + 2,250 \\, \\text{USD} = 5,750 \\, \\text{USD\/month}<\/p>\n\n\n\n

      Annual Electric Cost<\/h3>\n\n\n\n

      To find the annual cost, we multiply the monthly electric bill by 12: Annual Electric Cost=5,750\u2009USD\/month\u00d712\u2009months=69,000\u2009USD\/year\\text{Annual Electric Cost} = 5,750 \\, \\text{USD\/month} \\times 12 \\, \\text{months} = 69,000 \\, \\text{USD\/year}<\/p>\n\n\n\n

      Summary<\/h3>\n\n\n\n
        \n
      • Monthly Electric Bill<\/strong>: $5,750<\/li>\n\n\n\n
      • Annual Electric Cost<\/strong>: $69,000<\/li>\n<\/ul>\n\n\n\n

        This estimate assumes average rates for energy and demand charges. Actual rates may vary based on the utility provider, location, and other factors.<\/p>\n","protected":false},"excerpt":{"rendered":"

        A 15,000-square-foot commercial office building uses 35,000 kWh per month and has a peak demand of 150 kW. Estimate the monthly electric bill and the annual electric cost. The correct answer and explanation is: To estimate the monthly electric bill and the annual electric cost, we need to take into account both the energy consumption […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-239786","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/239786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=239786"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/239786\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=239786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=239786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=239786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}