A class starts after lunch at 1.00p.m. and lasts till 3.52 p.m. In this duration four periods are held. Before every period 4 minutes are allowed for going from one room to another. What is the exact duration for each period? [3708]

Q) A class starts after lunch at 1.00p.m. and lasts till 3.52 p.m. In this duration four periods are held. Before every period 4 minutes are allowed for going from one room to another. What is the exact duration for each period?

Options:
A)42 min.
B) 39 min
C) 41 min
D) 40 min

Answer

D) 40 min | Explanation:No. of interval between 4 periods=3 Therefore Time taken in the intervals=3x4=12 min. But total duration=2 hours 52 min. Therefore Time taken in all the four periods=2 hours 40 min. Therefore Exact duration for each period=40 min.

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