A is twice as fast as B and B is thrice as fast as C. The journey covered by C in 42 minutes will be covered by A in

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A is twice as fast as B and B is thrice as fast as C. The journey covered by C in 42 minutes will be covered by A in

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answer is A.

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Detailed Solution

Concept: Here, the time taken for A, B, and C is regarded as x, the time taken for the other two is represented by x, and the value of this variable x can be calculated using the conditions given in the question.
Let C's speed be x metres/min
Let time taken by A be y min.
Then, B's speed

metres

And, A's speed

metres

Ratio of speed of

and

Ratio of time taken by

and

Hence, option 1 is correct.

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