Multiple choice

Train P starts from point A at 10 am and runs at a constant speed of 60 km/hr on a straight track and reaches point B at a distance of 360km. Train Q starts from B at 11 am and runs towards A at some constant speed crosses train P at a distance of 120 km from B. what is the speed of train Q?(in km/hr)

  1. 40

  2. 30

  3. 50

  4. 60
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Train P travels at 60 km/hr. Meeting point is 120 km from B, so it's 360-120=240 km from A. Train P takes 240/60=4 hours to reach meeting point, so they meet at 2 pm. Train Q travels from 11 am to 2 pm (3 hours) covering 120 km. Speed = 120/3 = 40 km/hr.

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