Practicing Success
A train 108 m long moving at a speed of 50 km/hr crosses a train 112 m long coming from opposite direction in 6 seconds. The speed of the second train is
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48 kmph 54 kmph 66 kmph 82 kmph |
82 kmph |
Speed = \(\frac{ Distance}{ Time}\) Let the speed of 2nd train be x So, according to the question (50 + x) x \(\frac{5 }{18 }\) = \(\frac{\text{108 + 112}}{6}\) (50 + x) = \(\frac{\text{108 + 112}}{6}\) x \(\frac{18}{5}\) (50 + x) = \(\frac{\text{220}}{6}\) x \(\frac{18}{5}\) 50 + x = 132 x = 82 km/hr |