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The number of revolutions, a wheel of diameter 40 cm makes in travelling a distance of 176 m, is (Take π = 22/7)
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- 140
- 150
- 160
- 166
- 140
Correct Option: A
Using Rule 7,
Distance covered in 1 revolution = Circumference of wheel
| = 2πr = 2 × | × 20cm. | |
| 7 |
Total distance = 176 m = 17600 cm
| ∴ Number of revolutions = | ||
| 2 × | × 20 | |
| 7 | ||
| = | = 140 | |
| 2 × 22 × 20 |
