What is the missing length of a rectangular prism if height and width are both 8 inches. And surface area is 256 in^2
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To find the missing length of the rectangular prism, we can use the formula for the surface area of a rectangular prism, which is 2(hw + hl + lw), where h is the height, w is the width, and l is the length.
Given:
Height (h) = 8 inches
Width (w) = 8 inches
Surface area = 256 in^2
Surface area = 2(hw + hl + lw)
256 = 2(8*8 + 8l + 8l)
256 = 2(64 + 16l)
256 = 128 + 32l
128 = 32l
l = 4 inches
Therefore, the missing length of the rectangular prism is 4 inches.