Question

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 -​

Answer 1

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