Question 78

A circular running path is 726 metres in circumference. Two men start from the same point and walk in opposite directions @ 3.75 km/h and 4.5 km/h respectively. When will they meet for the first time?

Solution

Relative speed = $$3.75+4.5=8.25$$ km/hr = $$8.25\times\frac{5}{18}=\frac{13.75}{6}$$ m/s

Time taken for them to meet first time = distance/speed

= $$726\div\frac{13.75}{6}$$

= $$726\times\frac{6}{13.75}=316.8$$ sec

= $$\frac{316.8}{60}=5.28$$ minutes

=> Ans - (C)

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