1.  In covering a certain distance, the speed of A and B are in the ratio of 3 : 4. A takes 30 minutes more than B to reach the distance. The time taken by A to reach the destination is :
A. 1 hour
B. 1 hour 30 minutes
C. 2 hours
D. 2 hours 30 minutes

Answer: Option C

Explanation:

Ratio of speed = 3 : 4.
Ratio of times taken = 4 : 3.
Suppose A takes 4x hrs and B takes 3x hrs to reach the destination.

Then, 4x - 3x = 30/60 = 1/2

or x = 1/2

∴ Time taken by A = 4x hrs = 4 X hrs = 2 hrs.