Question
Andy can paint 1 house in 4 days. With Riordan's help, they can paint the same house in 3 days. How many days would Riordan take to paint the house alone?
4 m

Click button first when a symbol is required. X

Andy can paint 1 house in 4 days. With Riordan's help, they can paint the same house in 3 days. How many days would Riordan take to paint the house alone?