A do 2/5 part of work in 12 days and B do 3/4 part of work in 15 days.so,both together in how many days can finish the work?	Choose the correct choice from the following answers:
A) 15  B) 8  C) 10  D) 12  E) 14
work of A in 12 days=2/5,work of A in 1 days=1/30   work of B in 15 days =3/4,work of B in 1 days=1/20   (A+B) work in 1 days=[1/30+1/20]=1/12   so,both together finish the work in 12 days   answer 12
<result>D</result>
A do 2/5 part of work in 12 days and B do 3/4 part of work in 15 days.so,both together in how many days can finish the work?