Answer:
166 in^2
Explanation:
I know, this isn't the best way but we can add up all the sides:
2(28+20+35) = 2(83) = 166 in^2
Hope this helped
166
SA = 2lw** + 2lh +2hw
** It's 2 x l x w, not 21 x w (it looks like a 1, I know smhh)
l = 4
w = 7
h = 5
2*4*7 + 2*4*5 + 2*5*7 = 56 + 40 + 70
56 + 40 + 70 = 56 + 110
56 + 110 = 166
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