Question

A wheel of a car is making 4 revolution per second. If the diameter of the wheel be 84 cm find the speed of the wheel in cm/sec​

Answer 1

Answer:

1056 cm/s

Step-by-step explanation:

diameter=84 cm

circumference=πd=264

no of revolutions inn 1 sec=4

distance travelled=4×264

speed=1056 cm/s

Answer 2

Answer:

1056 cm/sec

Step-by-step explanation:

Diameter = 84 cm

1 revolution = Perimeter of the wheel

1 revolution =   π d = 3.14 * 84 = 264 cm

Distance = 264 * 4 = 1056 cm

Speed = Distance / time = 1056 / 1 = 1056 cm/sec.