Question

A can paint a wall in 5 days while B can do the same in 4 days.if they worked together for 2 days,what part of the wall will be painting​

Answer 1

Answer:

A,s one day work=1 /5

B's. .. = 1/4

A+B's. ... i/5 +1/4 = 4+ 5/20=9/20

A+B's 2 days work=9x2/20=18/20

= 9/10

9/10 Part