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5.A train 280 metres long is running at a speed of 42take to pass a man standing on a platform?6.A train 350 metres long crosses an electric pole in 28the train in km/hr. |
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Answer» QUESTION 5) :- A train 280 metres LONG is RUNNING at a SPEED of 42km/h. How much time it take to pass a man standing on a platform ? Answer :- → Distance covered in crossing a man = Length of train = 280m . → Speed of train = 42 km/h = (42*5/18) = (35/3) m/s . → Time to cover = (Distance/Speed) = 280 ÷ (35/3) = 280 * (3/35) = 24 seconds (Ans.) ______________________Question 6) :- A train 350 metres long crosses an electric pole in 28seconds . Find the speed of train in km/hr. . ? Solution :- → Distance covered in crossing a Electric pole = Length of train = 350m . → Time to cross = 28 seconds . → Speed of Train = (Distance/Time) = (350/28) = (25/2) m/s = (25/2) * (18/5) = 45 km/h (Ans.) ____________________________ |
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