Question

May someone please help
Me with this

Answer 1

Answer: The answer is 820

Explanation:

2(wl+hl+hw) = surface area

2(10x20 + 7x20 + 7x10) = 820

10x20 = 200

7x20 = 140

7x10 = 70

200 + 140 + 70 = 410

now take the 2 in front of the "(" and times it with the 410

410 x 2 = 820