A is travelling at 72 km per hour on a highway while B is travelling at a speed of 25 metres per second. What… · ABC26GN3599

Subject: General Aptitude · Chapter: Time and Distance

$A$ is travelling at 72 km per hour on a highway while $B$ is travelling at a speed of 25 metres per second. What is the difference in their speeds in metres per second?

(a)$1 \frac{1}{2} \mathrm{m} / \mathrm{sec}$

(b)2 m/sec

(c)$3 \mathrm{m} / \mathrm{sec}$

(d)5 m/sec

Answer

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Explanation

$A^{\prime} \mathrm{s}$ speed $=72 \mathrm{km} / \mathrm{hr}=\left(72 \times \frac{5}{18}\right) \mathrm{m} / \mathrm{sec}=20 \mathrm{m} / \mathrm{sec}$. B's speed = 25 m/sec. Difference $=(25-20) \mathrm{m} / \mathrm{sec}=5 \mathrm{m} / \mathrm{sec}$.

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