Question

A and b can do a job together in 7 days. a is 13/4 times as efficient as

b. the same job can be done by a alone in---------- days

Answer 1

1/7=4/13x+1/x so 17/13x=1/7 which is same as 13x/17=7 and x= 9.153846 thus a can do the work in 9.15 days