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A can do a piece of work in 12 days and B can do a same work in 20 days . They work together for 3 days and then A left away . In how many days will B finish the work

Posted by Danish Md 2 years, 8 months ago

CBSE > Class 08 > Mathematics

1 answers

Shagun Choudhary 2 years, 8 months ago

Work done by A in one day =1/12. work done by B in one day =1/20 . Work done by both In 1 day = 1/12 +1/20 = 5+3/60 8/60 =2/15 . Work done by both in 3 days =2/15×3 =2/5 . Remaining Work 1 -2/5 =3/5 . more do self

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CBSE > Class 08 > Mathematics