Question 99

A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 m to each the batsman?

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Solution

The speed of the cricket ball

$= 120 k m / h$

$= \frac{120 \times 1000}{60} = 2 \times 1000 = 2000 m / m i n$

$N o w s p e e d i n m / s = \frac{2000}{60} = \frac{200}{6} = \frac{100}{3} m / s$

So, 20 m can be covered in
$\frac{20 \times 3}{100} = \frac{60}{100} = 0.6 s$

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