Question

A bicycle wheel makes $5000$ revolutions in moving $11kms$ .The diameter of the wheel is

• A. $70cm$
• B. $50cm$
• C. $35cm$
• D. $28cm$

Answer 1

The correct option is A $70cm$

Distance covered by the wheel in one revolution
$=\frac{Distancecovered}{Numberofrevolutions}$

$=\frac{11}{5000}km$

$=\frac{11\times 1000\times 100}{5000}cm=220cm$

$\therefore$ Circumference of the wheel =$220cm$
or Let diameter = d cm
$\therefore \pi d=220cm$
$d=\frac{220}{\pi }$

$=\frac{220\times 7}{22}=70cm$