SOLUTION: A student is painting a room at a constant rate. 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?

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Question 967007: A student is painting a room at a constant rate. 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?
Found 2 solutions by ikleyn, MathTherapy:
Answer by ikleyn(52810) About Me  (Show Source):
You can put this solution on YOUR website!

If the student paints  4%2F5  of the room in  1%2F2  of the hour,  which is  30 minutes, she paints  1%2F5  of the room in  30%2F4 = 7.5 minutes.

Hence, it will take  5*7.5 = 37.5 minutes to paint the entire room.


Answer by MathTherapy(10555) About Me  (Show Source):
You can put this solution on YOUR website!

A student is painting a room at a constant rate. 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?
Time taken to paint entire room: 1.25 hours, or highlight_green%281%261%2F4%29 hours