Question

a boy is cycling such that the wheels of the cycle are making 140 revolutions per minute. if the diameter of the wheel is 60 cm , calculate the speed per hour with which the boy is cycling.

(a)15.8km/hr
(b)16.2km/hr
(c)11 km/hr
(d)18km/hr​

Answer 1

Answer:

(a) 15.8 km/h

Step-by-step explanation:

The diameter of a wheel is 60cm. We know that radius is half of the diameter. Now, the speed of the wheel will be equal to the product of revolution per second and circumference of the wheel. Therefore, the speed in km per hour with which the boy is cycling is equal to 15.84km/hr.

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