Answer:
66.59
Explanation:
The surface area can be calculated as follows
= a^2 + 2a √ a^2/4 + h^2
= 4^2 + 2(4) √ 4^2/4 + 6^2
= 16 + 8 √16/4 + 36
= 24 √ 4+36
= 24 √40
= 66.59
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