Question

lf base perimeter = 40 cm, slant height = 10 cm, what is lateral surface area of square pyramid?

• A. 260 cm²
• B. 200 cm²
• C. 400 cm²
• D. 432 cm²

Answer 1

Answer:

B. 200 cm²

The lateral surface area (LSA) of a square pyramid is:

$\text{LSA}=\frac{1}{2}\times(\text{Perimeter of base})\times(\text{Slant height})$

Given:

• Base perimeter (=40) cm

• Slant height (=10) cm

$\text{LSA}=\frac{1}{2}\times40\times10$

$=20\times10$
$=200\ \text{cm}^2$

Answer:

$\boxed{200\ \text{cm}^2}$