Question

The wheels of a cycle rotate 140 times per minute. If the diameter of the wheels is 60 cm, at what speed is the cycle moving? (Take π≈227)
Speed of the cycle =
km/h

Answer 1

Step-by-step explanation:

140 times a minute = 7 times in every 3 sec.

circumference = πd = 60 x 22/7

= 1320/7

i.e 7 times = 7 x 1320/7 cm in 3 sec.

or 7 x 440/7 cm/s

= 440 cm / s

hence, speed of cycle is 4.4 m/s