8. The radius of a wheel of a cycle is 70 cm and it takes 5 minutes to make 300 rotations. Find the
speed of the cycle in km per hour. Take 1 -
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Answer:
1.584 km/hr
Step-by-step explanation:
perimeter of wire =2πr=2×22/7 ×70
=440cm
dist in 5 min = 300×440cm= 132000cm
=132m
dist in 1 hr = (60/5)×132m =12×132m
= 1584m=1.584km
speed = dist/ time
= 1.584 km/hr
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