Unit 12 Contents

The Rectangle Model

Professor Peabody wants to paint the floor of the hallway in his laboratory. He forgot to estimate how much paint he will need and only bought one can of paint. The label says one can covers exactly 370 square feet. The hallway is 8 feet wide.

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1. If Professor Peabody painted 5 feet down the hall, how many square feet did he paint? How do you know?
2. How many more square feet will he be able to paint with his can of paint?
1. If Professor Peabody painted another 10 feet down the hall, how many more square feet did he paint this time? How do you know?
2. How many more square feet will he be able to paint with his can of paint?
13. How much of the length of the hallway can Professor Peabody cover with one can of paint? Solve the problem without using a ruler. Show or tell how you found your answer.
14. Does Professor Peabody have any paint left over? How much?