Question: A rectangular box has a length of 8 cm, width of 6 cm, and height of 5 cm. What is the total surface area of the box?
(A) 184 cm²
(B) 188 cm²
(C) 236 cm²
(D) 216 cm²
Solution:
The total surface area A of a rectangular box is given by:
A=2(lw+lh+wh)
where l is the length, w is the width, and ℎ is the height. Given l=8 cm, w=6 cm, and h=5 cm:
A=2(8×6+8×5+6×5)
A=2(48+40+30)
A=2×118
A=236 cm²
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