Question
A and B are two stations 390 km a part . A train starts from ! at 10 a.m. and travels towards B at 65 kmph. Another train starts from B at 11 a.m. and travels towards A at 35 mph. At what time do they meet ?
Answer: Option A
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Suppose they meet `x` hours after 10 a.m. Then .
(Distance moved by first in `x` hrs) + ( Distance moved by second in `(x - 1)` hrs = 390
`:.` `65x + 35(x - 1) = 390 rArr 100x = 425 rArr x = 4 1/4`.
So, they meet 4 hrs. 15 min.
after 10 a.m. i.e., at 2.15 p.m.
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