Surface area of the square pyramid is 140.8 sq unit.
Step-by-step explanation:
Given,
Length (b) of each side of the square base = 6.4 unit
Height (h) of the pyramid = 7.8 unit
To find the surface area of the square pyramid.
Formula
Surface area of the square pyramid = 2bh+[tex]b^{2}[/tex] sq unit
Hence,
Surface area of the square pyramid = 2×6.4×7.8+[tex]6.4^{2}[/tex] sq unit
= 99.84 + 40.96 sq unit = 140.8 sq unit.
