Question

The diameter of a wheel of a car is 70cm and it takes 5 minutes make 300 rotations. Find the speed of the cycle in km per hour​

Answer 1

Answer:

46.2 km/h

Step-by-step explanation:

the distance travelled =

the circumference of circle ×300=22/7×(70/2)^2

=4900/4×22/7

=700/2×11

=350×11

=3,850 c.m

speed=3850/300

=385/30=77/6 c.m/s

=18/5×77/6

=3/5×77

=231/5

=46.2 km/h

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