Question

You want to paint the walls of your bedroom. Two walls measure 15 ft by 11 ft and the other two walls measure 14 ft by 11 ft.What is the total area of the four walls?One gallon of paint covers 400 sq ft. How many gallons of paint will you need if you can only buy whole gallons?Paint costs $40 per gallon. Find the total amount to paint the bedroom.

Answer 1

We have four walls.

Two walls measure 15 ft by 11 ft.

To find the area of a rectangle, we multiply the length by the width:

Therefore:

Ar= 15ft * 11ft

Ar = 165ft²

We have two same walls, then, 2*165ft²=330ft²

Now, the other two walls measure 14 ft by 11 ft.

Ar = 14ft* 11ft

Ar = 154ft²

We have to same walls, hence, 2*154ft² = 308ft²

Then, the total area of the four walls is given by:

AT = 330ft² + 308ft²

AT =638ft²

One gallon of paint covers 400 sq ft.

We have a total area of 638 sq ft.

We can divide 638 ft² by 400ft²

638/400=