Question:
Two cubes each of 10cm edge are joined end to end .Find the surface area of the resulting cuboid
Answer:
Given that the length of each edge in the cube is 10 cm.
Again we know that
Surface area of a cube = 6a2
where a is the side of a cube.
Now when we cubes are joined end to end, then out of 12 surfaces, two surfaces are lost due to join.
So we have to calculate surface are of total 10 surfaces.
Now surface area of resulting cuboid = 10*(10)2
= 10*100
= 1000 cm2
So surface area of resulting cuboid = 1000 cm2
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