3 years ago

Find the surface area of the composite solid.

Mathematics

2 answers:

eimsori [14]3 years ago

7 0

Answer:

281 ft²

Step-by-step 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

Nitella [24]3 years ago

4 0

Answer:

the answer is attached to the picture

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