Question

A and b can do a job together in 7 days. A is 1 times as efficient as b. The same job can be done by a alone in :

Answer 1

Answer:

As Ais Itime as efficient as B

Let the work of Iday of A and B bex

then I/x+I/x=1/7

. (I + I)/x = I/7

2/x=1/7

x = 14

A will do the workin 14 days