Question

two train start from same station at 11 p.m. in opposite direction at speed of 72 km/h and 63 km/h ,respectively. at what time they will be 810 km apart

Answer 1

Given
Speed of one train =72km/h

Speed of another train =63km/h

Direction of moving = opposite to each other

Then total speed = s1+s2

=72+63

=135km/h

Total distance =810km

Speed=135km/h

Time =810/135

Time=6 hr

Starting time was 11:00 pm

So trains will be 810km apart at 5:00AM

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