A 280-metre long train crosses a platform thrice its length in 50 seconds. What is the speed of the train in… · ABC26GN3883
Subject: General Aptitude · Chapter: Problems on Trains · Exam: M.B.A.-C.E.T. 2008
A 280-metre long train crosses a platform thrice its length in 50 seconds. What is the speed of the train in km/hr?
(a)60.48
(b)64.86
(c)80.64
(d)82.38
(e)None of these
Answer
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Explanation
Length of train = 280 m. Length of platform $$=(3 \times 280) \mathrm{m}=840 \mathrm{m} .$$ ∴ Speed of train $=\left(\frac{280+840}{50}\right) \mathrm{m} / \mathrm{sec}=\frac{1120}{50} \mathrm{m} / \mathrm{sec}$ $$=\left(\frac{1120}{50} \times \frac{18}{5}\right) \mathrm{km} / \mathrm{hr}=80.64 \mathrm{km} / \mathrm{hr} .$$
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