A takes 5 days less than B to complete the work. Both complete the work in 6 days. In how many days A complete the work?
A) 10
B) 15
C) 20
D) 30
A takes 5 days less than B to complete the work. Both complete the work in 6 days. In how many days A complete the work?
A) 10
B) 15
C) 20
D) 30