Question

A class starts after lunch at 1.00 p.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?

• A. 42 min
• B. 39 min
• C. 41 min
• D. 40 min

Answer 1

Answer: (B)

39 min

The class starts from $1:00$ pm till $3:52$pm.
The total duration of the class is $2$ hours $52$ min i.e.$172$ min
There are $4$ periods held in this duration i.e. each period is for $43$ minutes
Four minutes are given to move from one class to another
Therefore, each period is for $43-4=39$ minutes.
Answer is Option B