A car travels from point A to point B. The average speed of the car is 60 km/hr and it travels the first half of the trip at a speed of 50 km/hr. What is the speed of the car in the second half of the trip? Choose the correct choice from the following answers:
A) 55
B) 60
C) 75
D) 80
E) 90
Let D be the distance and let V be the speed in the second half.   The total time = T1 + T2   D/60 = D/100 + (D/2) / V   D/150 = D/2V and so V = 75 km/hr   The answer is 75.
<result>C</result>
A car travels from point A to point B. The average speed of the car is 60 km/hr and it travels the first half of the trip at a speed of 50 km/hr. What is the speed of the car in the second half of the trip?