Question

The number of revolutions made by a wheel of radius $r_1$ to cover a distance of $5\frac{1}{2}$ km is 2500, while another wheel of radius $r_2$ made 3125 revolutions to cover the same distance. Then $r_1 + r_2 = ?$}

• A. 60 cm
• B. 61 cm
• C. 62 cm
• D. 63 cm

Hint:

Radius $r = \frac{\text{Total Distance}}{2 \pi \times \text{Revolutions}}$.

Answer 1

The Correct Option is D