Lisa glued two pieces of wood together to make the letter L in her art class. She plans to paint all sides of it purple, including the base.

Note: Figure is not drawn to scale.
The longer piece of wood has dimensions of 1 inch by 1 inch by 6 inches. The shorter piece of wood has dimensions of 3 inches by 1 inch by 1 inch. How many square inches of purple paint will Lisa use to paint her letter L?
A.40 square inches
B.38 square inches
C.39 square inches
D.29 square inches

Question

Lisa glued two pieces of wood together to make the letter L in her art class. She plans to paint all sides of it purple, including the base.


Note: Figure is not drawn to scale.
The longer piece of wood has dimensions of 1 inch by 1 inch by 6 inches. The shorter piece of wood has dimensions of 3 inches by 1 inch by 1 inch. How many square inches of purple paint will Lisa use to paint her letter L?
A.40 square inches
B.38 square inches
C.39 square inches
D.29 square inches

parissfrance09 · Answer

please help me

directrix · Answer

TA of longer piece = 2(lw) + 2(hw) + 2(lh) 2*1*1 +2*6*1 + 2*1*6 = 2 + 12 + 12 = 26 TA of shorter piece = 2(lw) + 2(hw) + 2(lh) = 2*1*1 + 2*3*1 + 2*1*3 = 14 Add the two surface areas together. 26 + 14 = 40 Subtract the area where the two pieces of wood are attached. Because that section will not be painted on either piece of wood, two times that area must be subtracted. 40 - (2*1*1) = how many square inches of purple? @parissfrance09 Similar Problem: https://sites.google.com/a/sau23.org/7th-grade-math/click-here-for-solutions-to-problems-1