Question

A bicycle wheel of radius 42cm is rolled over a distance of 66m. How many revolutions does it make? [Take π=22/7]

Answer 1

In one revolution, the bicycle covers a distance equal to the circumference of the wheel.

So, in one revolution, the bicycle covers
$C=2 \pi r=2* \frac{22}{7}*0.42(m)= 44*0.06(m)=2.64 (m)$

In a distance of 66 m the bicycle makes $\frac{66}{2.64}= 25$ revolutions


Answer: 25 revolutions