A and B take 6 hr and 9 hr respectively to complete a work. A works for 1 hr and B works for 2 hr.(1) How much work is done in these 3 hrs?(2) How much work is still left?

A and B take 6 hr and 9 hr respectively to complete a work. A works fo

1.	A and B take 6 hr and 9 hr respectively to complete a work. A works for 1 hr and B works for 2 hr.(1) How much work is done in these 3 hrs?(2) How much work is still left?
Answer» A completes full work in 6 hours and B in 9 hours Work that A completes in 1 hour = 1/6 of the total Work that B completes in 2 hours = 2/9 of the total If both work one by one, work COMPLETED altogether will be 1/6 + 2/9 (LCM = 18) = 1/6 X 3/3 + 2/9 x 2/2 = 3/18 + 4/18 = 7/18 Work DONE = 7/18 Work remaining = 18/18 - 7/18 = 11/18 There's your answer. Hope you found it useful, my friend .

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A and B take 6 hr and 9 hr respectively to complete a work. A works for 1 hr and B works for 2 hr.(1) How much work is done in these 3 hrs?(2) How much work is still left?

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