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?
Answer & explanation
Correct answer: option 2
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