3 years ago

HELP I NEED THE ANSWER

Mathematics

1 answer:

gladu [14]3 years ago

7 0

Answer:

Step-by-step explanation:

2 walls are 30 x 9 and 2 walls are 20 x 9 and there are 4 units

30 x 9 = 270, 20 x 9 = 180

4(2)(270) + 4(2)(180) = 3600, so the answer is B

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adoni [48]

Answer:

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Step-by-step explanation:

$Solution,\\\\Ratio\:of\:boys\:to\:girls=3:7\\\\Total\:students=20\\\\Let,\\\\\hookrightarrow Boys=3x\\\\\hookrightarrow Girls=7x\\\\Now\:we\: have,\\\\\hookrightarrow 3x+7x=20\\\\\hookrightarrow 10x=20\\\\\hookrightarrow x=20/10=2\\\\Again,\\\\\hookrightarrow Boys=3x=3\times2=6\\\\\hookrightarrow Girls=7x=7\times2=14$