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a,b,c help please

 May 19, 2020
 #1
avatar+111438 
+3

a)

 

Volume  of  pool    =    [ area  of a trapezoid  with bases of  1m, 1.3m   and height  of 12]  *   4

 

So we  have

 

(1/2) (12)  ( 1 + 1.3)    *  4   =

 

6 ( 2.3)  *  4   =

 

24 * 2.3  =

 

55.2  m^3     =   55.2 * (1000 L)  =  55,200 L

 

b ) Time it takes to fill the pool   =    55,200  / 7.5   =  7360 min

 

 

 

2)  Cost

 

2.75   (55.2)  = 152.625  pounds

 

 

cool cool cool

 May 19, 2020
 #2
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Thank you!

Guest May 19, 2020
 #3
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where is the 1.3 coming from

Guest May 19, 2020
 #4
avatar+111438 
0

1.3  =  depth of the pool   at  the deep end  (in meters)

 

 

cool cool cool

CPhill  May 19, 2020
 #5
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wait what?

Guest May 19, 2020
 #6
avatar+93 
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No, It is 1.8. I guess 3 and 8 look similar!

NightShade  May 19, 2020
 #7
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yes it 1.8 m

Guest May 19, 2020
 #8
avatar+111438 
+1

OK....this doesn't show up well for me

 

So....revised answer

 

a)  (1/2) (12) ( 1.8 +1) * 4  =   6 (2.8) * 4  =  67.2 m^3  =  67,200 L

 

b )  67200/7.5  =  8960 min

 

c)  2.75 * 67.2  =  184.8  pounds

 

 

cool cool cool

CPhill  May 19, 2020
 #9
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0

THANKS MAN!

Guest May 19, 2020
 #10
avatar+93 
0

Thank goodness, we have a correct answer now!

 May 19, 2020

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