Subtract 65 minutes from the sum of 145 minutes and 1 hour 20 minutes. The answer is . A. 165 mins B. 2 hrs 40 mins C. 215 mins D. 3 hrs 40 mins
The correct answer and explanation is:
To solve this, we first need to add 145 minutes and 1 hour 20 minutes.
1 hour is equivalent to 60 minutes, so:
1 hour 20 minutes = 60 minutes + 20 minutes = 80 minutes.
Now, add 145 minutes and 80 minutes:
145 minutes + 80 minutes = 225 minutes.
Next, subtract 65 minutes from this sum:
225 minutes – 65 minutes = 160 minutes.
Now, convert 160 minutes into hours and minutes.
Since 1 hour is 60 minutes, divide 160 minutes by 60:
160 ÷ 60 = 2 hours and 40 minutes.
Therefore, the correct answer is B. 2 hours 40 minutes.
This process involves simple arithmetic operations: first adding the minutes, then subtracting the required amount, and finally converting the result into a more familiar unit of hours and minutes. This ensures we handle the time properly, especially when working with units like hours and minutes.