A can do a piece of work in 15 days and B can do it in 10 days. Working together how long will they take to finish the work?

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Job Solution Social Islami Bank Ltd Social Islami Bank Ltd - Trainee Officer - 31.12.2010 গণিত
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If the numerator and the denominator of a proper fraction are increased by the same quantity, then the resulting fraction is --

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in a mixture of 60 liters, the ratio of milk and water 1:2 ?

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