Practice | Hashtable

1. In 100 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:

A. 20 m

B. 25 m

C. 22.5 m

D. 9 m

Solution:

\begin{aligned} Distance covered by B in 9 sec \\ = (\frac{100}{45} \times 9) m \\ = 20 m \\ ∴ A beats B by 20 metres \end{aligned}

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