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Question

The total surface area of a rectangular prism is 348 cm2; and the height and width of the prism are 9 cm and 6 cm respectively. What is the length of the rectangular prism?

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Solution

Dear student,The solution is:Given:Total surface area of a rectangular prism=348 cm2height=h=9 cm width=w=6 cm length=l=?Total surface area of a rectangular prism=2lh+2hw+2lw 348 =2×9×l+2×9×6+2×l×6 348 =18l+108+12l 348-108=30l 240=30l l=24030 l=8 cm so, The length of a rectangular prism is 8 cm.

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