In a race, the speeds of A and B are in the ratio 3:4. A takes 30 minutes more than B to reach the destination. The time taken by A to reach the destination is?  Choose the correct choice from the following answers
A) 1 hr B) 2 hr C) 1.5 hr D) 2.5 hr E) 3 hr

Rationale: explanation : ratio of speeds = 3 : 4 distance remaining constant , the ratio of time taken = 4 : 3 a takes 0.5 hours more than bhence time taken by a = 4 × 0.5 = 2 hour answer : b
Answer: B