Question 47
P and Q run around a circular track of 240 m at 15 m/min and 20 m/min speeds respectively. If they start running simultaneously, after what time will they meet again at the starting point?
Solution
Their relative speed is = $$\left(20-15\right)\ \frac{m}{\min}=5\ \frac{m}{\min}.$$
So, They will meet at starting point after $$\frac{240}{5}\ \min=48\ \min.$$
D is correct choice.
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