Two trains whose lengths are 450 metres and 300 metres are moving towards each other at the speed of 162 km/hr and 108 km/hr respectively. If distance between trains is 300 metres, then in how much time, these trains will cross each other?
A. 14 seconds
B. 28 seconds
C. 35 seconds
D. 21 seconds
Answer: Option A
Solution (By Examveda Team)
$$\eqalign{ & {\text{Time}} = \frac{{450 + 300 + 300}}{{\left( {162 + 108} \right) \times \frac{5}{{18}}}}\,\sec \cr & = \frac{{1050 \times 18}}{{270 \times 5}}\,\sec \cr & = 14\,\sec \cr} $$This Question Belongs to Arithmetic Ability >> Speed Time And Distance
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