three cubes each of the sides three cm are joined find the surface area of resulting cuboid please solve as faster as possible please please
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Length of the resulting cuboid 5+5+5=15cm
Height and breadth remain same as 5cm
Total surface area of a cuboid =2(l×b+b×h+l×h)
=2(15×5+5×5+15×5)=350cm^2
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