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A can complete 1/15 part of work in a day
B can do 1/12 part of work in work
C can do 1/20 part in a day
they together can do = 1/15 + 1/ 12 + 1/20
= 8 + 10 + 6/120
= 24/120
= 1/5
so they together can work 1/5 part of work in a day
They worked for 2 days so they completed 1/5 × 2 = 2/5 part of work
remaining part of work = 1 - 2/5
= 3/5
3/5 part of work completed by A and B
A and B work in a day = 1/15 + 1/12
= 4 + 5 /60
= 9/60
= 3/20
A and B can complete work in 3/5 ÷ 3/20
= 3/5 × 20/3
= 4
so the remaining work is completed by A and B in 4 days
B can do 1/12 part of work in work
C can do 1/20 part in a day
they together can do = 1/15 + 1/ 12 + 1/20
= 8 + 10 + 6/120
= 24/120
= 1/5
so they together can work 1/5 part of work in a day
They worked for 2 days so they completed 1/5 × 2 = 2/5 part of work
remaining part of work = 1 - 2/5
= 3/5
3/5 part of work completed by A and B
A and B work in a day = 1/15 + 1/12
= 4 + 5 /60
= 9/60
= 3/20
A and B can complete work in 3/5 ÷ 3/20
= 3/5 × 20/3
= 4
so the remaining work is completed by A and B in 4 days
Thatsomeone:
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