| The radius of a wheel is 21 cm. How many revolutions will it make in travelling 924 m? [use \[\pi =22/7\]] |
A) 7
B) 11
C) 200
D) 700
Correct Answer: D
Solution :
| Radius of wheel = 21 cm |
| Circumference \[=2\pi r=2\times \frac{22}{7}\times 21=132cm\] |
| \[\therefore \] Number of revolutions |
| \[=\frac{924}{132}\times 100=7\times 100=700\] |
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