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If a cuboid of dimensions 10 cm×15 cm×5 cm is cut to form cubes of sides 5 cm, then what is the difference between the sum of the surface areas of these cubes and the surface area of the original cuboid?

 

 Jan 12, 2020
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Each smaller cube has a side area of 5x5 = 25 cm^2

in the original solid you can see 22 of these sides    22x25 = 550 cm2

 

Each smaller cube has 6 sides     6 x 25 =150 cm2   and there are 6 of them   = 900 cm2

 

 

I think you can calc the diff ! cheeky

 Jan 12, 2020
edited by ElectricPavlov  Jan 12, 2020

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