Question

How to find the number of revolutions a wheel of diameter 40 cm makes in travelling a distance of 176m is?

Answer 1

distance covered in 1 revolution = 2πr2πr = 2 x (22/7) x 20 = 880/7 cm
required no of revolutions = 17600 x (7/880) = 140

Answer 2

Answer:

The number of revolutions a wheel of diameter 40 cm makes in travelling a distance of 176 m is 141 .

Step-by-step explanation:

Diameter of wheel = 40 cm

Radius of wheel = $\frac{Diameter }{2} =\frac{40}{2}=20 cm$

Circumference of wheel = $2 \pi r = 2\times 3.14  \times 20 =125.6 cm$

So, distance covered in 1 revolution = 125.6 cm

No. of revolutions in travelling a distance of 176 m i.e. 17600 cm = $\frac{17600}{125.6}=140.12$

Hence the number of revolutions a wheel of diameter 40 cm makes in travelling a distance of 176 m is 141 .