Question

how long will a man take to make a round of circular field of radius 21 M size cycling at the speed of 8 km per hour

Answer 1

Answer:

1 minute

Step-by-step explanation:

Given : speed = distance / time

so, time = distance /speed

here , distance = 2πr = 2×22/7×21 => 132m

speed = 8km/h = 8×5/18 = 20/9 = 2.2m/s

t = 2πr/2.2 m/s

t = 132/2.2m/s => t = 60 sec or 1 minute

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