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

= $$\frac{60}{10}:\frac{60}{12}:\frac{60}{15}$$

= $$6:5:4$$

=> Ans - (C)