Posted by Erika on .
If the length (L) of the prism is 10 inches, and each rectangular face has a width (W) 2ã3 of inches, determine the total surface area of the prism in square inches. Round your answer to the nearest inch.

Math Measurements 
bobpursley,
the three sides: 3L*W total
the two ends: area=w^2 sqrt3 /4