Answer
The surface area of the box is 26 ft squared.
Work Step by Step
$S=2(h\times d + h\times w + d\times w)$
$S=2(3\times1.4+ 3\times2 + 1.4\times2)$
$S=2(4.2+6+2.8)$
$S=26$
The surface area of the box is 26 ft squared.
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