Practice | Hashtable

1. In a 300 m race A beats B by 22.5 m or 6 seconds. B's time over the course is:

A. 86 sec

B. 80 sec

C. 76 sec

D. None of these

Solution:

\begin{aligned} B runs \frac{45}{2} m in 6 sec \\ ∴ B covers 300m in \\ = (6 \times \frac{2}{45} \times 300) \sec \\ = 80 sec \end{aligned}

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