One student can paint a wall in 20 minutes. another student can paint the same wall in 30 minutes. working together, how long will it take for them to paint the wall? 10 minutes 12 minutes 15 minutes 25 minutes

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

the answer is a

step-by-step explanation:

because your just changing the position of where the shape is

∠cbe and ∠deb are same-side interior angles.

i took the test