Question

Find the surface area of the composite solid.

Answer 1

281 ft²

Explanation:

Cuboid + lateral surface area of the pyramid - square base

2[(4×12)+(4×5)+(12×5)] + 4[½×5×(12-7)] - 5²

2(48+20+60) + 4(12.5) - 25

2(128) + 50 - 25

256 + 25

281 ft²

Answer 2

`281 {ft}^(2)`