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Question

The length of cuboid is 12 cm, breadth and height are equal and its volume is 432 cm3. The cuboid is cut into 2 cubes, find the lateral surface area of each cube.

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Solution

Given, =12 cm , Volume =432 cm3
b=h
×b×h=432
12×h2=432
h2=36
h=6
So b=6
Cube should have all sides of same length,
The dimensions of cuboid are 12×6×6 and hence it can be cut into two cubes along the side of length =12 cm
So each cube will have 6×6×6 dimensions.
Hence, side of cube a=6
Lateral surface area of cube =4a2
=4×62
=144 cm2

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