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22-05-2016
Mathematics

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A rectangular prism is 3 meters long, 4 meters wide, and has a total surface area of 94 square meters. What is its height?

3 m
4 m
5 m
6 m

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22-05-2016

SA=2(LW+LH+WH)
SA=94
L=3
W=4
94=2(3*4+3H+4H)
divide both sides by 2
47=3*4+3H+4H
47=12+7H
minus 12 both sides
35=7H
divide oth sides by 7
5=H

5m

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