question_answer

When a man travels equal distance at speed \[\text{x km}/\text{h}\] and \[\text{y km}/\text{h},\]his average speed is\[\text{4 km}/\text{h}\]. But when he travels at these speed for equal time, his average speed is\[\text{4}.\text{5 km}/\text{h}\]. The difference of the two speed is:

A) \[\text{2 km}/\text{h}\]

B) \[\text{4 km}/\text{h}\]

C) \[\text{3 km}/\text{h}\]

D) \[\text{5 km}/\text{h}\]