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Q.

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

7 minutes

b

14 minutes

c

28 minutes

d

63 minutes 

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 Question Image metres Question ImageAnd, A's speed Question Image metres Question ImageRatio of speed of Question Image and Question Image Ratio of time taken by Question Image and Question ImageQuestion ImageQuestion ImageQuestion ImageHence, option 1 is correct.
 
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