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Surface area of solids

DIFFICULTYstandardexam
Question 1 of 8

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The surface-area calculation is for a right square-based pyramid. Wrapping material covers every included outer surface

Its square base has side length 24 m. Its perpendicular vertical height is 9 m

The slant height s of every triangular face, measured from the apex to the midpoint of a base edge, is 15 m. The square base and all four triangular faces are included

Schematic net with a square base of side 24 m and four congruent triangular faces. Each triangle has perpendicular face height 15 m, measured from the midpoint of its base edge to its apex. This slant height is not the vertical height inside the solid.24 m
Net not to scale. The dashed vertical inside the upper triangle is its face height s = 15 m. The four dashed square edges are folds
1 mark

What is the solid's total included surface area?

Format: Exact value