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I'll be so grateful if you answered all of these questions!

 Feb 12, 2019
 #1
avatar+100519 
+1

(3a)    Plaster required =   

 

(1/3) (area of base ) ( height) =

(1/3) (15^2) ( 12)  =

4 * 225  =

900 cm^3

 

(3b)   The scale factor of the prop is 3 times that of the model

So....the volume of the prop =

 

Volume of model * (scale factor)^3 =

900 * (3)^3 =

900 * 27 =

24,300 cm^3

 

(3c)  The volume of the prop is  27 times that of the model   = (scale factor)^3  = 3^3 = 27

 

 

cool cool cool

 Feb 12, 2019

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