Question

Diameter of a wheel of a car is 70 cm. How much distance will it cover in 120 revolutions?

Answer 1

Step-by-step explanation:

Distance covered will be=Number of revolutions × Circumference

Radius of wheel =

2

70

=35 cm

Distance covered in 5 revolutions will be

D=5×2π×5=50π=50×

7

22

=157.14m

Answer 2

Diameter of the wheel = 70 cm

Radius of the wheel = 35 cm

Circumference of the wheel = 2πr

$= > \bf2 \times \frac{22}{7} \times 35 \\ \\ \bf = > 2 \times 22 \times 5 \\ \bf = > 220 \: cm$

So,

• Distance covered in one revolution = 220 cm

Distance covered in 120 revolutions

$\tt= (220 × 120) \: cm \\ \tt = \green{ 28400} \: cm$