Question:
The distance covered by a wheel of radius 14 cm in 5 revolutions is:
The distance covered by a wheel of radius 14 cm in 5 revolutions is:
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The distance covered by a rolling wheel in **one revolution** is equal to its **circumference**.
Updated On: Oct 27, 2025
- \( 400 \) cm
- \( 440 \) cm
- \( 288 \) cm
- \( 388 \) cm
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The Correct Option is B
Solution and Explanation
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 \( \pi \approx 3.14 \):
\[ 140 \times 3.14 = 439.6 \approx 440 \text{ cm} \]
\[ C = 2\pi r = 2\pi (14) = 28\pi \] For 5 revolutions:
\[ \text{Total Distance} = 5 \times 28\pi = 140\pi \] Approximating \( \pi \approx 3.14 \):
\[ 140 \times 3.14 = 439.6 \approx 440 \text{ cm} \]
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