A b and c can do a work 12 days 15 days and 20 days respectively they worked together but after 2 days a left the work and 2 days before the completion of job b left in how many days work will be completed
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One day's work =a+b+c =1/15+1/12+1/20=1/5
2 day's work of a,b,c together=2×1/5=2/5
Remaining work=1-2/5=3/5
Combine work of both a,b=1/15+1/12=3/20
The no. of days taken by a,b to finish the remaining work =3/5÷3/20=4
Anwer is 4
2 day's work of a,b,c together=2×1/5=2/5
Remaining work=1-2/5=3/5
Combine work of both a,b=1/15+1/12=3/20
The no. of days taken by a,b to finish the remaining work =3/5÷3/20=4
Anwer is 4
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