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Question 10
The ratio of the speed of P, Q and R is 10 : 12 : 15 respectively. What is the ratio of the time taken by P, Q and R respectively to cover the same distance?
Solution
Speed is inversely proportional to time.
=> Ratio of time taken = $$\frac{1}{10}:\frac{1}{12}:\frac{1}{15}$$
L.C.M.(10,12,15) = 60
=Â $$\frac{60}{10}:\frac{60}{12}:\frac{60}{15}$$
= $$6:5:4$$
=> Ans - (C)
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