A class start at 10 a.m. and lasts till 1.27 p.m. Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ............

42 minutes

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48 minutes

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51 minutes

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53 minutes

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Solution

The correct option is A 48 minutes
From $10$ a.m. till $1.27$ p.m., time $= 3$ hours $27$ minutes
$= 3 \times 60 + 27 = 207$ minutes
Total free time $= 5 \times 3 = 15$ minutes
$∴$ Total time for the periods $= 207 - 15 = 192$ minutes
$∴$ Each period has time $= \frac{192}{4} = 48$ minutes

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A class start at 10 a.m. and lasts till 1.27 p.m. Four periods are held during this interval. After every period, 5 minutes are given free to the students. The exact duration of each period is ............

The correct option is A 48 minutesFrom 10a.m. till 1.27 p.m., time=3 hours 27 minutes=3×60+27=207 minutesTotal free time=5×3=15 minutes∴Total time for the periods=207−15=192 minutes∴ Each period has time =1924=48 minutes

The correct option is A 48 minutes
From $10$ a.m. till $1.27$ p.m., time $= 3$ hours $27$ minutes
$= 3 \times 60 + 27 = 207$ minutes
Total free time $= 5 \times 3 = 15$ minutes
$∴$ Total time for the periods $= 207 - 15 = 192$ minutes
$∴$ Each period has time $= \frac{192}{4} = 48$ minutes