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miv72 [106K]
3 years ago
15

I need help plsss. im stuck

Mathematics
1 answer:
noname [10]3 years ago
6 0

Answer:

h = 6 cm

Step-by-step explanation:

Volume of cylinder = 54 π cm³

πr²h = 54π

π * 3 * 3 * h = 54π

h = \frac{54 \pi }{\pi *3*3}\\\\h= 6

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the numbers of girls in the choir is 4 times the number of boys in the choir .the total number of students is 60..how many girls
Inessa05 [86]
First, make up some variables to represent the number of Girls and Boys in the choir.  

B = number of boys
G = number of girls

You know that there are 4 times as many girls in the choir as boys.  Therefore, the equation you can write is:
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If you cross-multiply, then you get the simplified equation:
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Intuitively this makes sense since if you multiplied the number of boys in the class by 4, that would be equal to the number of girls you have.

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To solve the equation, replace the G in this equation with the replacement you found before, 4B.
G + B = 60 -->
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5B = 60 -->
B = 12

However, you are trying to find the number of girls, so plug the answer back into your equation.
G + B = 60 -->
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