Mensurationmedium · Past Paper
The base of a prism is an equilateral triangle of side 4 cm. If its height is 10 cm, find its total surface area.
A120 + 8√3 sq. cm
B120 + 4√3 sq. cm
C40 + 8√3 sq. cm
D60 + 4√3 sq. cm
✓ Correct Answer: A — 120 + 8√3 sq. cm
LSA = Perimeter * h = 12 * 10 = 120. Base area = (√3/4)*4² = 4√3. TSA = 120 + 2(4√3) = 120 + 8√3 sq. cm.
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