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frez [133]
4 years ago
15

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.Eac

h 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?
Mathematics
1 answer:
Marta_Voda [28]4 years ago
3 0
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.



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