The diameter of a wheel is 98 cm. The number of revolutions in which it will have to cover a distance of 1540 m is
In 1 revolution wheel will complete a distance of $$2\pi r = 2 \times \pi \times \frac{98}{2}$$ = 308 cm.
Hence to cover 1540 m. , revolutions will be = $$\frac{1540\times100}{308} = 500$$
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