Question

After half-leave (mid-day), a school runs from 1 pm to 3: 52 pm. There were four periods in this period. After each period, 4 minutes are allowed to go from one room to another. Describe how many minutes each period was? (1) 39 minutes (2) 40 minutes (3) 41 minutes (4) 42 minutes

Answer 1

Answer:

Total time taken to move from one room to another=4*4 min=16 min

Total duration between 1 pm to 3:52 pm= 2hrs 52 min

Time duration of period without taking time from moving one room to other=2 hrs 52 min-16 min

        = 2 hrs 32 min

The time for 1 period=(2*60+32)/4 min

                                    =(120+32)/4 min

                                    = 152/4 min

                                    =38 min

Total time of 1 period= 38min+4min

                                    = 42 min