29-05-2018
Mathematics

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any help please? :/

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simondunk simondunk

29-05-2018

The answer is 894cm ². 13 x 9 x 2 + 15 x 9 x 2 + 15 x 13 x 2 = 894

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29-05-2018

I think it's
[tex]894 \: cm^{2} [/tex]
Reason:
2 sides 13 x 9 = 2x13x9 = 234
2 sides 13 x 15 = 2x13x15 = 390
2 sides 15 x 9 = 2x15x9 = 270

234 + 390 + 270 = 894 cm^2

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