Question

How many times a wheel of radius 35 cm must rotate to go 440m.​

Answer 1

How many times a wheel of radius 35 cm must rotate to go 440m?

$\large{\sf{\underline{Solution:-}}}$

Here,

We are given the radius of a wheel and we need to find that how much time we have to rotate it to go 440m.

So,

• Firstly, we need to find the curved surface area of the wheel or the circumference of the circle.
• Then, we will divide 440m by the circumference to get our answer.

★Circumference of circle:

• Radius = 35cm = 0.35 m

= 2πr

= 2 × 22/7 × 0.35

= 2 × 22 × 0.5

= 44 × 0.5

= 22.0

★No. of rotatations to go 440m:

= Total distance to be covered/ Total circumference of circle

= 440/22

= 20

Therefore, we have to rotate it 20 times to go 440m.