Question

2.
The diameter of the wheel of a car is 77 cm. How far will it go in
20 turns?​

Answer 1

Answer:

4840 cm (48.4 m)

Step-by-step explanation:

d =77

r = 77/2

distance covered in 20 turns =  20 x circumference of the wheel

= 20 x 2 x 22/7 x 77/2

= 4840 cm

= 48.4 m

Answer 2

Answer:

         4840 cm

Step-by-step explanation:

Diameter = 77cm

Radius = 77/2 cm

Circumference = 2πr or πd

= 2 x 22 / 7 x 77 / 2 or 22/7 x 77

= 11 x 22 or 11 x 22

= 242cm

In one turn the wheel rotates and completes a distance which is equal to its circumference

∴ distance travelled in 1 turn = 242 cm

distance travelled in 20 turns = 20 x 242

= 4840cm

∴ the car will go 4840cm in 20 turns