A and B are two cars travelling to a destination which is 360 kilometres away. A takes 4 hours to reach the destination. How much time will it take B to reach the destination if the speeds of A and B are in the ratio 9: 12 ?



A and B are two cars travelling to a destination which is 360 kilometres away. A takes 4 hours to reach the destination. How much time will it take B to reach the destination if the speeds of A and B are in the ratio 9: 12 ?

A. 2.5 hrs

B. 3.5 hrs

C. 4.5 hrs

D. 3 hrs

Answer : D. 3 hrs


Explanation :

    9x/12x = 9/12
    Time = Distance / Speed
    4 = 360/9x
    so x = 10
    12x = 120
    Time taken by car b = 360/120 =3 hour



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