alex needs to varnish the top and the bottom of a dozen rectangular wooden planks.The planks are 8 feet long and 3 feet wide.Each pint of varnish covers about 125 square feet and costs $3.50. A:What is the total area that alex needs to varnish? B:How much will it cost alex to varnish all the wooden planks?
Given: 12 rectangular planks 2 sides per plank Length = 8 ft Width = 3 ft Area of a rectangle = Length * Width. A = 8ft * 3ft A = 24 ft² 24 ft² x 2 sides of a plank = 48 ft² 48 ft²/plank * 12 planks = 576 ft² is the total area Alex needs to varnish. 576 ft² ÷ 125 ft² = 4.608 pint or round to 5 pints 5 pints x $3.50/pint = $17.50 Total cost that Alex need to spend to varnish all the wooden planks.