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A is twice as...

Question

A is twice as fast as B and B is thrice as fast as C is.The journey covered by C in 54 minutes will be covered by B in

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Solution

Let $S^{'} s$ speed $= x$ km/hr $B^{'} s$ speed $= 3 x$ km/hr
$A^{'} s$ speed $= 6 x$ km/hr Ratio of speed $= x : 3 x : 6 x = 6 : 3 : 1$
Ratio time taken $= \frac{1}{6} : \frac{1}{3} : 1 = 1 : 2 : 6$ .

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