By Mansi Yadav

Verified by Ajay Kumar

In a square pyramid, the base side is 6 cm and slant height is 10 cm. Find lateral surface area.

  1. 120 cm²

  2. 130 cm²

  3. 140 cm²

  4. 150 cm²

Answer: A

Solution

Solution: Lateral surface area of a square pyramid \(=\frac12\times\text{perimeter of base}\times\text{slant height}\). The base perimeter is \(4\times6=24\) cm. Therefore, LSA \(=\frac12\times24\times10=120\text{ cm}^2\). Trick: For a square pyramid, multiply the base perimeter by the slant height and divide by 2.

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