A car travels a distance of 100 km. For the first 30 minutes it is driven at a constant speed of 80 km/hr. The motor begins to vibrate and the driver reduces the speed to 40 km/hr for the rest of the trip. The average speed for the entire trip is
A) 60.0 km/hr.
B) 53.3 km/hr.
C) 50.0 km/hr.
D) 47.5 km/hr.
E) 40.0 km/hr.

Question

Quizplus · Accepted Answer

The Answer of A car travels a distance of 100 km. For the first 30 minutes it is driven at a constant speed of 80 km/hr. The motor begins to vibrate and the driver reduces the speed to 40 km/hr for the rest of the trip. The average speed for the entire trip is
A) 60.0 km/hr.
B) 53.3 km/hr.
C) 50.0 km/hr.
D) 47.5 km/hr.
E) 40.0 km/hr.

A Car Travels a Distance of 100 Km