QUESTION

CSAT

Hard

Maths

Prelims 2016

A class starts at 11:00 am and lasts till 2:27 pm. Four periods of equal duration are held during this interval. After every period, a rest of 5 minutes is given to the students. The exact duration of each period is

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Explanation

Total duration of the class: Start time = 11:00 am End time = 2:27 pm Total time = (3×60+27)=207(3 \times 60 + 27) = 207 minutes

Rest time: Number of rest breaks = 3 Rest time per break = 5 minutes Total rest time = 3×5=153 \times 5 = 15 minutes

Time spent on periods: Time for periods = Total time - Total rest time = 20715=192207 - 15 = 192 minutes

Duration of each period: Duration per period = Time for periods / Number of periods = 192/4=48192 / 4 = 48 minutes

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