a, b, c can do a piece of work in 15,12 and 20 days respectively they started the work together but she left after 2 days in how many days will the remaining work be completed by a and b
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in 1 day a,b,c can do(1/15+1/12+1/20)=12/60=1/5
in 2 day a,b,c can do2/5 part
rest=1-2/5=3/5
in 1 day a and b can do (1/15+1/12)=3/20
3/20 part a and b can do in 1 day
1 part can do in 20/3 day
3/5 part can do in 20×3/(3×5)=4 day
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in 2 day a,b,c can do2/5 part
rest=1-2/5=3/5
in 1 day a and b can do (1/15+1/12)=3/20
3/20 part a and b can do in 1 day
1 part can do in 20/3 day
3/5 part can do in 20×3/(3×5)=4 day
MARK AS brainliest
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