Problema Solution
You want to paint the walls of your bedroom. Two walls measure 17 ft by 9 ft, and the other two walls measure 13 ft by 9 ft. The paint you wish to purchase costs $17 per gallon, and each gallon will cover 400 ft2 of wall. Find the total amount you will spend on paint.
Answer provided by our tutors
the total area that i want to paint is
2 walls (rectangles) with 17 ft by 9 ft + 2 walls (rectangles) with 13 ft by 9 ft = total area
2*17*9 + 2*13*9 = 540 ft^2
how many gallons do i need to paint 540 ft^2 if 1 gallon = 400 ft^2
540/400 = 1.35 gallons
therefore i will spend total of 1.35*17 = $229.95 for the paint.