Car A drives East at 20 kph at half an hour earlier than car B that started at the same point at 50 kph. How long will car B overtake car A, in minutes?

Car A drives East at 20 kph at half an hour earlier than car B that started at the same point at 50 kph. How long will car B overtake car A, in minutes?

A. 25 C. 20
B. 30 D. 15

Solution