Question

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

• A. $42$
• B. $21$
• C. $30$
• D. $60$

Answer 1

The correct option is A $42$

Distance covered in $1$ revolution$=\frac{660}{500}=1.32m$

$\Rightarrow 2\pi r=1.332m=132cm$

$\Rightarrow \frac{22}{7}\times d=132\Rightarrow d=\frac{132\times 7}{22}=42cm$

$\therefore$Diameter of wheel$=42cm$