Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km… · ABC26GN3890

Subject: General Aptitude · Chapter: Problems on Trains · Exam: M.B.A. 2002

Two trains are moving in opposite directions @ 60 km/hr and 90 km/hr. Their lengths are 1.10 km and 0.9 km respectively. The time taken by the slower train to cross the faster train in seconds is

(a)36

(b)45

(c)48

(d)49

Answer

Answer (as printed): C

Explanation

Relative speed $=(60+90) \mathrm{km} / \mathrm{hr}$ $$=\left(150 \times \frac{5}{18}\right) \mathrm{m} / \mathrm{sec}=\left(\frac{125}{3}\right) \mathrm{m} / \mathrm{sec} .$$ Distance covered $=(1.10+0.9) \mathrm{km}=2 \mathrm{km}=2000 \mathrm{m}$. $$\text { Required time }=\left(2000 \times \frac{3}{125}\right) \mathrm{sec}=48 \mathrm{sec} .$$

Study loop for Problems on Trains

1. Practise the PYQsPrevious-year questions, with answers

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