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The area of the surface of a pool table is 24 square feet. The pool table is 6 feet long. How wide is it?

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Sagot :

Answer: The pool table is rectangle, so we assume it with Length a feet and b feet, respectively.

 

So area=a*b=24 square feet

perimeter=2(a+b)= 22 feet

 

then we calculate with this two equation to get a and b.

 

because  a+b=11, then a=11-b, we put this into a * b=24

 

then we get (11-b)*b=24,  

b^2-11b+24=0

b=3 feet or b=8 feet

then we can get a by a=11-b, if b=3, then a=8; if b=8, then a=3.

 

so the dimension of the pool table is 3 feet and 8 feet

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