Dr. J's Maths.com
Where the techniques of Maths
are explained in simple terms.

Calculus - Differentiation - Applied max/min questions.
Type 3: Basic 3D shapes - Test Yourself 2 - Solutions.


 

Boxes

 

(i)

(ii)

(iii)

 

2.

 

3. (i) The number given to us is the volume = 500 cm3 = x2 y

The sides of the box consist of:

  • a base with area x2;
  • 4 sides of area xy.

(ii)
Cones.  
   
   
Cylinders.