Question

A car covers a distance of 660 metres in 30 rotations. The diameter of the wheel is
a) 3.5 metres b) 5 metres 7 metres d) 6 metres​

Answer 1

Answer:

Diameter= 7meters

Step-by-step explanation:

1 rotation = 660/30

= 22 meters

Therefore Perimeter of a circle= 22 meters

2πr = 22

2×22/7 × r = 22

r= 3.5 meters

d = 2r= 7 meters

Answer 2

ANSWER: The diameter of the wheel is 14 m

Step-by-step explanation:

here,

car covers a distance of 660m in 30 rotations

therefore distance covered in one rotation= 660/30 = 22m

Now,

distance covered in one rotation= circumference of the circle

22= 22/7×r

therefore r= 22×7/22

7m

diameter= 2×r= 2×7= 14m