Question

two trains a and b run between two stations. train a runs at an average speed of 70 kilometer per hour and train b runs at an average speed of 90 kilometer per hour. if train a takes 18 hours in its journey, how long will train b take in its journey? ​

Answer 1

Answer:

distance between a and b = 70 × 18 km

speed of train b is 90

train b will take 70×18/90 = 14 hr