A class starts at 9:40 a.m. and ends at 10:25 a.m. How long is it?
A35 minutes
B45 minutes
C55 minutes
D65 minutes
Answer & Solution
Correct answer: B. 45 minutes
1. From 9:40 to 10:00 is 20 minutes.
2. From 10:00 to 10:25 is 25 minutes, so the total is 20 + 25 = 45.
3. Subtracting 40 - 25 directly gives 15 and is wrong.
_Source: Wikipedia, 24-hour clock, Description_
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