What is the correct answer?

4

# A person travels from P to Q at a speed of 40 km/hr and returns by increasing his speed by 50%. What is his average speed for both the trips ?

44 km/hour

46 km/hour

48 km/hour

50 km/hour

### Correct Answer :

C. 48 km/hour

Speed while going = 40 km/hr
Speed while returning = 150% of 40 = 60 km/hr
Average speed =$\frac{2xy}{x+y}$