Question

I need help, please!!

Answer 1

1. Calculate the perimeter of the base

2. Multiply half of the perimeter of base with the slant height

So ,

Perimeter of base = 60m+60m+60m+60m = 240m

Lateral area of pyramid =

`(1)/(2) * (240m) = 120m \\ \\ 120m * 40m = 4800m`