Answer:
(23 times 1/3) -5 = 2 2/3
Step-by-step explanation:
Answer: 36
Step-by-step explanation:
54/3 = 18 x 2 = 36
1) in one minute for first wiil be 1/20
the other 1/30, it means that A paint in one minute 1/20 and B 1/30 then A+B in one minute 1/20 + 1/30 = 3+2/60 = 5 / 60, 5/60 = 1/12
if in one min they make 1/12 then in 12 min they paint all the wall