1.

The speeds of A and B are in the ratio 3 : 4. A takes 20min more than B to reach a destination. In what time does A reach the destination ?

Answer»

4/3 hours



Ratio of speeds = 3 : 4
Ratio of time taken = 4 : 3
Let the time taken by A and B be 4X hours and 3X hours respectively.
Then 4x - 3x = 20/60
or x = 1/3
Time taken by A = 4x hours
4 * 1/3 = 4/3 hours


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