Question 1085830
The surface area of the cube is:
{{{ 4*4*6 = 96 }}} cm2
( 6 4x4 faces )
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The surface area of the rectangular block is:
{{{ 8*4*2 + 2*4*2 + 8*2*2 }}}
( 2 8x4 faces, 2 2x4 faces, 2 8x2 faces )
{{{ 64 + 16 + 32 = 112 }}}
{{{ 112 - 96 = 16 }}} cm2 increase in surface area
{{{ (16/96)*100 = 16.67 }}}
16.67% increase