Question

Two stations a and b are 110 km apart on a straight line. one train starts from a at 7

a.m. and travels towards b at 20 kmph. another train starts from b at 8

a.m. and travels towards a at a speed of 25 kmph.at what time will they meet?

Answer 1

$\frac{x}{20 } - \frac{100 - x}{25} = 1 \\ x = 500 \div 9km \\ time =500 \div 9 \div 20 \\ = 2hrs46min40sec \\ train \: meets \: at \: 9 hrs \: \: 46 \: min \: 40 \: secc$