The base of a right pyramid is a square of side 16 cm long.

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The base of a right pyramid is a square of side 16 cm long. If its height be 15 cm, then the area of the lateral surface in square centimetre is :

Height of the triangle = √15² + 8²
= √225 + 64 = √283
= 17 cm
∴ Area of the lateral surface of pyramid = 4 × Area of triangle

= 4 ×	1	× base × height
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= 4 ×	1	× 16 × 17 = 544 sq.cm.
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