A can do a piece of work in 14 days while B can do it in 21 days they can can work together.But three days before the completion of work A leaves of. Find the total number of days taken to complete the work
Answers
Answered by
1
A can do a piece of work in 14 days and B in 21 days. They begin together, but 3 days before the completion of the work, A leaves of. Find the total number of days taken to complete the work.
Answer:-
In 6 days A and B would complete 6(1/14)+6(1/21) = 5/ 7 work
In 6 days A and B would complete 6(1/14)+6(1/21) = 5/ 7 workHence pending work is 1–5/7 = 2/7
In 6 days A and B would complete 6(1/14)+6(1/21) = 5/ 7 workHence pending work is 1–5/7 = 2/7B works at 1/21 work per day
In 6 days A and B would complete 6(1/14)+6(1/21) = 5/ 7 workHence pending work is 1–5/7 = 2/7B works at 1/21 work per dayhence to complete 2/7 work B will need 2*21/7 days = 6days.
Hope! it helps
Similar questions