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https://vle.mathswatch.co.uk/images/questions/question2326.png

 

 Oct 28, 2017
edited by Melody  Oct 28, 2017
 #1
avatar+27 
+1

We have :

the legnth ; a

height ; b

depth : c

 

When we stack them only a will change. 

 

A(a,b,c) = a*b*c

 

A1(a1 b1 c1 ) = 28 * 20 * 15 = 8.400

 

A2 (a2 b2 c2 ) = (1.5*x) * 19.3 * 14.2 

 

x ; Equals the time you should stack them. 

 

A2 (a2 b2 c2 ) = (1.5*17) * 19.3 * 14.2 = 6988,53 

 

b and c is constant. 

We look if we have these requirements. 

 

b=> b2

20 => 19,3

 

c=> c2

15 => 14.2

 

If yes, then we have to look at a.

 

 a=> a

 a=> 1.5*x

 

And since 

a=> 1.5*17

28 => 25,5 

 

So the statement is true and everything is fine. 

 Oct 28, 2017
edited by Sekai  Oct 28, 2017
edited by Sekai  Oct 28, 2017

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