Question

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

(Assume $\pi =\frac{22}{7}$)

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

Answer 1

The correct option is B

22 cm

1 complete rotation = circumference of the wheel = 2$\pi r$=$\pi d$

(where, r is the radius and d is the diameter =2r)
$\therefore$Distance covered =$\pi d$
$=\frac{22}{7}\times 7$
$\Rightarrow$ Distance covered = 22 cm.