Question

A wheel has a diameter of 42 cm. How many revolutions will it take to cover a distance of 26.4 m?​

Answer 1

Answer:

20 revolutions

Step-by-step explanation:

given, a wheel has diameter(d) of 42 cm

radius of the wheel (r) = d/2 = 42/2 = 21cm

circumference of the wheel = 2πr

2*π*21=131.946cm

we need to find revolutions (n) the wheel would take to cover 26.4 m (2640cm)

So, 131.946*n = 2640

n = 2640/131.946

n = 20

Therefore, the number of revolutions is 20