The task is to generate the correct answer for a given math problem.

Q: Problem: a shopkeeper loses 15 % , if an article is sold for rs . 102 . what should be the selling price of the article to gain 20 % ?

A: rs . 144
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Q: Problem: a starts business with rs . 3500 and after 8 months , b joins with a as his partner . after a year , the profit is divided in the ratio 2 : 3 . what is b â € ™ s contribution in the capital ?

A: 15750
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Q: Problem: a train running at the speed of 60 km / hr crosses a pole in 18 seconds . find the length of the train ?

A:
300 meter
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