Question

A wheel completes 2000
at 1.5 m
completes 2000 rotations in covering a distance of 9.5 km. The diameter of the wheel is
(b) 1.5 cm
(c) 7.5 m
(d) 7.5cm​

Answer 1

1 rotation equals to 9.5*1000/2000 = 4.75 m
2πr= 4.75
r = 4.75/2π = 0.755m
d = 2*0.755= 1.5m