Question

The diameter of a wheel of a cycle is 21 cm How far will it go in 28 complete revolutions?

• A. 3696 cm
• B. 3669 cm
• C. 3966 cm
• D. None of these

Answer 1

Answer: (A)

3696 cm

$\because$ r = 21 cm
$\therefore$ Distance covered in 1 revolution
=$28\times 2\times \frac{22}{7}\times 21$
=3696 cm