Twice the speed of A is equal to thrice the speed of B.To travel a certain distance, A takes 42 minutes less than B to travel the same distance. What is the time (in minutes) taken by B to travel the same distance? |
135 126 120 96 |
126 |
Let Speed of A = A km/h Speed of B = B km/h According to Question , 2A = 3 B Ratio of speed of A & B = 3 : 2 Speed is inversely proportional to Time . So , Ratio of Time of A & B = 2 : 3 Now , 3R - 2R = 1R 1R = 42 minutes 3R = 3 × 42 = 126 minutes So , Time taken by B is 126 minutes
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