What is the slant height of a square pyramid that has a surface area of 525 square meters and a side length of 15 meters?

Question

anonymous · Answer

$$\large \color{red}{S.A. = (Side)^2 + 2 \times l \times s}$$

S.A. is Surface Area of Square Pyramid:

L is slant height         and         s is Side

anonymous · Answer

So:

$$\large 525 = (15)^2 + 2 \times l \times (15)$$

$$\large 525 = 225 + 30l$$

Subtract both the sides by 225 first and then divide both side by 30 to get Slant Height(l)..