Question

a student is painting a room at a constant rate she is able to paint 2/5 of the room in 1/2 of an hour how long does it take to paint the whole room

Answer 1

1 1/4 Hours

Explanation:

2/5+2/5=4/5

4/5=1 hour

1/2/1/2=1/4

1/5 room in 1/4 hour

1+1/4=1 1/4 hours

Answer 2

She is able to paint 2/5's of the room in 1/2 hour. How long does it take to paint the whole room? = 7.5 minutes. Hence, it will take 5*7.5 = 37.5 minutes to paint the entire room.