5. Four cubes of side 7 cm each are joined together to form a cuboid. Find the surface area of the resulting cuboid
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Answer:
Given,
Side of a cube = 7cm
When they joined together the length of the four cube = 7 × 4 = 28cm
Then the length of the cuboid= 28cm
In a cube the height and the side is same.
Hence, the height of the cuboid = 7cm
breadth is also = 7cm
TSA of a cuboid :
= 2(l × b + b × h + h × l )
= 2( 28 × 7 + 7 × 7 + 7 × 28 )
= 2( 196 + 49 + 196 )
= 2( 392 + 49 )
= 2 ( 441)
= 882 cm^2
Step-by-step explanation:
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