Start learning 50% faster. Sign in now
Let the speed of the current be x kmph. According to the question, 14/(14 – x) = 2 ⇒ 28 – 2x = 14 ⇒ 2x = 28 – 14 ⇒ x = 14/2 = 7 km/hr
Without stopping the speed of the train is 135 kmph, with stopping the speed of the train is 90 kmph.Find the stop time of the train?
A train running with a speed of 45 km/hr can cross a pole in 10 seconds and a platform in 20 seconds. Find the length of the platform.