Question

crevolution
Q.109-The number of revolutions made by wheel of radius
14 cm in covering a distance of 44 km is ?​

Answer 1

Radius=14 cm

so, Circumference=

$2 \times \pi \times r = 2 \times 3.14 \times 14 = 87.92cm$

1 km =100000 cm

44 km = 100000*44= 4400000 cm

A.T.Q,

=> No.of revolution*circumference= distance covered

=> 4400000÷87.92= 50,045.49

So,the wheel will rotate 50,045.49 times

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