Santay could clean one fourth of his area in an hour by himself. Leticia could clean four fifths of her area in an hour by herself. When working together how long does it take?

Answer 1

Santay needs 4 hours to clean his area

Leticia needs 1.25 hours to clean her area

You do not clearly state whether they are cleaning both areas together or separately. The following is for both areas.

t/4 + t/1.25 = 2

5t + 16t = 40

21t = 40

t = 1.9