Q. 125.0( 3 Votes )

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Answer :

The figure obtained on joining of two cubes of side 4cm is cuboid of length 8cm, breadth 4cm and height 4cm.

So we know that the surface area of cuboid=2(lb + bh + lh)


Where l=8cm,b=4cm,h=4cm


Surface area= 2(8 × 4 + 4 × 4 + 8 × 4)


= 2(80)=160cm2


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