Question

A wheel completes 2000 rotations in covering a distance of 9.5 km. The diameter of the wheel is

• A. 1.5 m
• B. 1.5 cm
• C. 7.5 m
• D. 7.5 cm

Answer 1

The correct option is A 1.5 m

Distance covered by wheel in 1 rotation $=2\pi r=\pi D$
(Where, D = 2r = diameter of wheel)
$\therefore$ Distance covered in 2000 rotation $=2000\pi D=9.5\times {10}^{3}m$ (given)
$\therefore$ D = 1.5 meter