The length and breadth of a playground are 80 m and 35 M respectively .How long will a boy take to go 3 times round the field if he walks at rate of 1.5 m per second
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I THINK SO 460 SEC FOR 3 TIMES
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soln:
Perimeter of ground = 2(Length + Bredth) = 2(80 + 35) = 2×115 = 230 meter
Distance travelled by boy in completing 3 round = 3 × perimeter of ground = 3 × 230 = 690 meter
Time taken by boy = Total Distance/Speed = 690/1.5 = 460 sec = 7.66 minutes = 0.12 hours
Hope it helps you!
Perimeter of ground = 2(Length + Bredth) = 2(80 + 35) = 2×115 = 230 meter
Distance travelled by boy in completing 3 round = 3 × perimeter of ground = 3 × 230 = 690 meter
Time taken by boy = Total Distance/Speed = 690/1.5 = 460 sec = 7.66 minutes = 0.12 hours
Hope it helps you!
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