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Renu was sitting inside train A, which was travelling at 50 km/h. Another train, B whose length was three times the length of A crossed her in the opposite direction in 15 seconds. If the speed of train B was 58 km/h. Then the length of train A (in m) is:
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& {\text{Lenth of train A}} = l \cr
& {\text{Lenth of train B}} = 3l \cr
& \frac{{3l}}{{\left( {50 + 58} \right) \times \frac{5}{{18}}}} = 15 \cr
& \frac{{3l \times 18}}{{108}} = 15 \times 5 \cr
& l = 150{\text{ m}} \cr} $$
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