Question

The wheel of a cycle covers $660metres$ by making $500$ revolutions. What is the diameter of the wheel (in cm)?

Answer 1

distance covered by wheels in 1 Rev.

is $\pi D$ ('D' is Dia. of wheel)

& $660=n\left(\pi D\right)=\left(500\pi \right)D$

$\Rightarrow D=0.42m=42cm$