A wheel completes 2000 rotations in covering a distance of 9.5 km. The diam

Question

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

Options:

A . 1.5 m

B . 1.5 cm

C . 7.5 m

D . 7.5 cm

Answer: Option A
:
A
Distance covered by wheel in 1 rotation

= 2 π r = π D

(Where, D = 2r = diameter of wheel)

∴

Distance covered in 2000 rotation

= 2000 π D = 9.5 \times 10^{3} m

(given)

∴

D = 1.5 meter

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