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0 votes
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in Mathematics by (63.7k points)

A and B are two stations 390 km apart. A train starts from A 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 kmph. At what time do they meet?

1 Answer

+1 vote
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Best answer

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 

100x = 425 

x = 17/4 

So, they meet 4 hrs.15 min. after 10 a.m i.e., at 2.15 p.m.

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