On a straight road, a bus is 30 km ahead of a car travelling 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.
Answer & explanation
Correct answer: option 2
Let the speed of the car be C km/h
According to the question,
Relative speed = C - 42 km/h
Distance = 30 + 60 = 90 km
Now Speed of the car will be
C - 42 = \(\frac{90}{3}\)
C - 42 = 30
C = 30 + 42 = 72 km/h
So , The speed of the car is 72 km/h