Answers

2014-07-01T13:00:54+08:00
Formula: A=2(wl+hl+hw)
= 2(2.1x3.2 + 2.7x3.2 + 2.7x2.1)
=2(6.75+8.64+5.67)
=2(21.06)
= 42.12 ANSWER
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