Question

The distance covered by a wheel of radius 14 cm in 5 revolutions is:

• A. \( 400 \) cm
• B. \( 440 \) cm
• C. \( 288 \) cm
• D. \( 388 \) cm

Hint:

The distance covered by a rolling wheel in **one revolution** is equal to its **circumference**.

Answer 1

The Correct Option is B

The distance covered in one revolution is the circumference:
\[ C = 2\pi r = 2\pi (14) = 28\pi \] For 5 revolutions:
\[ \text{Total Distance} = 5 \times 28\pi = 140\pi \] Approximating \( \pi \approx 3.14 \):
\[ 140 \times 3.14 = 439.6 \approx 440 \text{ cm} \]