Multiple choice

The base of a right pyramid is a square of a side 16 m long. If its height be 15 m , then the area of the lateral surface is ? एक समकोणीय पिरामिड जिसका आधार एक वर्ग हैं जिसकी भुजा 16 मी हैं| यदि इसकी ऊँचाई 15 मी हो तो इसका तिर्यक क्षेत्रफल ज्ञात करें ?

  1. 520

  2. 544

  3. 540

  4. 534
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B Correct answer
Explanation

Square base side = 16 m, height = 15 m. Slant height of each triangular face = √(8² + 15²) = 17 m (apothem of base = 8). Lateral surface area = 4 × area of one triangular face = 4 × (1/2 × 16 × 17) = 544 m².

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