Question

the radis of a wheel of a cycle is 70cm and it takes 5 min to make 300 rotations. Find the speed of the cycle in km/hr​

Answer 1

speed=total distance travelled/time
speed =300/5=60
speed of the cycle is 60

Answer 2

Answer:

Step-by-step explanation:

Radius =70cm

Distance covered in one rotation = circumference of wheel =2πr

=2× 22/7 ×70

=440cm

Distance covered in 300 rotation =300×440

=132000=  

100000

132000  =1.32km

Given that distance of 1.32km is covered in 5 minutes or  5/60=1/12

​  

 hour.

Therefore,

Speed of cycle =  

distance/time=(1.32//5/60)

=1.23*60/5=15.84km/hr