A) 40 min and 30 min |
B) 80 min and 60 min |
C) 90 min and 45 min |
D) 90 min and 50 min |
B) 80 min and 60 min |
Ratio of speeds of A and B = 3 : 4
Ratio of time taken = 4 : 3
Let time taken by A and B be 4x and 3x respectively.
Then, according to the question, 4x-3x=20 = x=20
Hence, time taken by A
= 4 X 20 = 80 min
and time taken by B = 3 X 20 = 60 min