Question

how long will a man to take to make a round of a circular field of radius 21 metre cycling at the speed of 8 kilometre per hour​

Answer 1

Answer:

perimeter of circular field as it move at the corners of the field . so ,

Perimeter of field = 2 pi r

= 2*22*7*21 m

= 132 m

Speed = 8 km / h

=8*1000/3600 m / s

= 2.22 m / s

= 2 m / s ( approx )

Time = distance / speed

Time = 132/2 sec

Time = 66 sec

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