the length and breadth of a playground are 80 meter and 35metre respectively.
(i) how long will a boy take to go three times round the field, if he walks at rate of 1.5metre per second.
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Answer:
l=80 m
b=35 m
perimeter of rectangle=2x(l+b)
=2x(80+35)
=2x115
=230
distance covered by the boy =3 times the perimeter
=3x230
=690
speed=1.5m/s
speed=distance/time
1.5m/s=690/t
t=690x10/1.5x10 (to remove the decimal from the denominator we multiply by 10)
t=6900/15
=460
therefore time taken by boy is 460 secs
Step-by-step explanation:
ajay1234527:
thnx
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