Find the surface area of a rectangular prism with a length of 8 inches, a width of 5 inches and a height of 2 inches.
so far this is what I have-
(2(8)+2(5))2=72 + 2(8.5)=80
my answer is 152in^2
the books answer is 132in^2
What did I do wrong???? Thanks for the help!
recall that surface area of rectangular prism is given by
SA = 2*(LW + LH + WH)
where
L = length
W = width
H = height
substituting,
SA = 2*[(8)(5) + (8)(2) + (5)(2)]
SA = 2*(40 + 16 + 10)
SA = 2*(66)
SA = 132 in^2
hope this helps~ :)
Come eat dinner honey
Thank you so much Jai-that really cleared thing up
battery shaped like a rectangular prism is 8 inches long, 5 inches wide, and 4 inches tall. What is the surface area of the battery? _ square inches how do I solve this
Find the surface area of rectangular prism
ur mom
To find the surface area of a rectangular prism, you need to calculate the area of each face and then add them together.
A rectangular prism has six faces: three pairs of congruent faces. For this problem, the faces are as follows:
1. Top and bottom faces: The area of each top and bottom face is equal to the length multiplied by the width. In this case, the length is 8 inches and the width is 5 inches, so the area of each top and bottom face is 8 * 5 = 40 square inches.
2. Front and back faces: The area of each front and back face is equal to the length multiplied by the height. In this case, the length is 8 inches and the height is 2 inches, so the area of each front and back face is 8 * 2 = 16 square inches.
3. Side faces: The area of each side face is equal to the width multiplied by the height. In this case, the width is 5 inches and the height is 2 inches, so the area of each side face is 5 * 2 = 10 square inches.
Now, to find the total surface area, you need to add up the areas of all the faces:
Total Surface Area = (2 * top/bottom area) + (2 * front/back area) + (2 * side area)
= (2 * 40) + (2 * 16) + (2 * 10)
= 80 + 32 + 20
= 132 square inches
Therefore, the correct answer is 132 square inches, not 152 square inches. It seems you made a calculation mistake in your previous attempt.