Question

A bicycle wheel has a diameter of $7cm.$ What distance does the wheel cover on the ground if it completes 1 full rotation?

$(\text{Take}\pi =\frac{22}{7})$

• A. $44cm$
• B. $22cm$
• C. $21cm$
• D. $42cm$

Answer 1

The correct option is B

$22cm$

1 complete rotation $=$ circumference of the wheel $=2\times \pi \times r$ [where, $r$ is radius]

So, Distance covered $=\pi \times d$ [As $d=2r,$ where, $d$ is diameter]

$=\frac{22}{7}\times 7$

$\Rightarrow$ Distance covered $=22cm$