A can do the work in 24 days and the efficiency of B is 25% less than the efficiency of A. If Both A and B worked for 5 days and then A left then the remaining work was done by B in how many days.
1
10 (3/4) days
2
7 (1/2) days
3
8 (1/2) days
4
20 (1/3) days
5
12 (1/2) days