The relative speed of a train in respect of a car is 90 km/h when train and car are moving opposite to each other. Find the actual speed of train . If car is moving with a speed of 15 km/h.?

80 km/h
105 km/h
75 km/h
100 km/h

Correct Answer: 100 km/h

Explanation:

Relative speed of train
= Speed of train + Speed of car
⇒ 90 = Speed of train + 15
∴ Speed of train = 90 - 15 = 75 km/h

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