Question

The diameter of the wheel of a car is 70cm. If the car travelled a distance of 33km. Find the number of revolution of the wheel.​

Answer 1

Given ,

• ★ Diameter of the wheel → 70 cm.
• So, radius of the wheel → 70/2 = 35 cm.

Now,

Perimeter of the wheel = 2πr

→ Perimeter of the wheel = 2 × 22/7 × 35

→ ‡ Perimeter of the wheel

= 220 cm.

= 220/100000 km.

= 0.0022 km.

So,

★ The revolution of the wheel

$= \bold{\frac{Distance \: travelled \: by \: the \: car}{perimeter \: of \: the \: wheel} }$

$= \frac{33}{0.0022}$

$= \frac{330000}{22}$

$= \frac{30000}{2}$

$= \boxed{ \bold{15000 \: \: \: times}}$