The speeds of A and B are in the ratio 4:7. A takes 30 minutes more than B to reaches a destination. Time in which A reach the destination?
Show answer & explanation
Correct answer: D
Explanation
Speed Ratio A : B = 4 : 7
Time Difference = 30 minutes
Time Ratio A : B = 7 : 4
Let A's time = 7x, B's time = 4x
7x − 4x = 30
3x = 30
x = 10
A's time = 7x = 70 minutes