Mensurationhard · Past Paper
The total surface area of a prism whose base is a right-angled triangle is 200 sq. cm and height is 10 cm. Find the perimeter of the base if the base area is 20 sq. cm.
A16 cm
B18 cm
C20 cm
D24 cm
✓ Correct Answer: A — 16 cm
TSA = 2*Base + Perimeter*h => 200 = 2*20 + P*10 => 160 = 10P => P = 16 cm.
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