A can do a work in 14 days and working together A and B can do the same work in 10 days. In what time can B alone do the work?
25 days
30 days
23 days
35 days
Explanation:
1 day work of A=1/14
1 day work of (A+B)=1/10
Given:A+B=1/10
or,1/14+B=1/10
or,B=1/10-1/14
Or,B=2/70=1/35
Now, 1/35 part of work is done in 1 day by B.
So,1 work will be done in 1รท1/35=35 days.
B can alone do the work in 35 days.
1 day work of A=1/14
1 day work of (A+B)=1/10
Given:A+B=1/10
or,1/14+B=1/10
or,B=1/10-1/14
Or,B=2/70=1/35
Now, 1/35 part of work is done in 1 day by B.
So,1 work will be done in 1รท1/35=35 days.
B can alone do the work in 35 days.