Answer:
It takes Sharon 1 hour to paint by herself.
Step-by-step explanation:
if it takes 1 hr and 30 mins for the two to finish it together that means that's the average of both Mel and Sharon's time.
So multiply 1 hr and 30 mins by 2 (since there are two people)
that gives us 3 hrs, in which we subtract Mel's two hours.
It takes Sharon 1 hour to paint by herself.
