Question
A train crosses a pole and a platform of length 420
metres in 10 seconds and 25 seconds, respectively. Find the length of train.Solution
Let the speed of train be 'v' m/s.
Length of train = '10v' metres
So, (10v + 420) ÷ 25 = 'v'
Or, 10v + 420 = 25v
Or, 15v = 420
So, 'v' = 28
Therefore, length of the train = 10 × 28 = 280 metres
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