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Given: base length, b= 3m

Slant height of the pyramid, s = 5m

Since it is a square pyramid, the base of the pyramid is a square.

Surface area of a square pyramid = b

This gives: Surface area of the square pyramid, SA= (3)

Therefore, the surface area of the given square pyramid is 39m

Given: base length, l= 6m, base width, w = 4m

Slant height of the pyramid, s = 8m

Since it is a rectangular pyramid, the base of the pyramid is a rectangle.

Surface area of the rectangular pyramid = (l* w) + (l* s) + (w* s)

This gives: Surface area of the rectangular pyramid, SA= (6* 4) + (6* 8) + (4* 8) = 104m

Therefore, the surface area of the given rectangular pyramid is 104m