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On a straight road, a bus is 30 km ahead of a car traveling in the same direction. After 3 hours, the car is 60 km ahead of the bus. If the speed of the bus is 42 km/h, then find the speed of the car.

A67 km/h

B72 km/h

C65 km/h

D59 km/h

Answer:

B. 72 km/h

Read Explanation:

Relative speed in same direction = Speed of car - speed of the bus speed of the car be x Relative speed = x - 42 km/h Distance = 30 + 60 = 90 km x - 42 = 90/3 x - 42 = 30 x = 30 + 42 = 72 km/h


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