Question

Two cubes of side 4 cm each are joined end to end, find the volume of cuboid so formed:

Answer 1

Answer:

or you can do 16×16 (cube)

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Answer 2

Answer:

unitary method-

we know that the cuboid is formed by 2 cubes

so, we will find the volume of each cube a and multiply by 2

so, volume of cube = side*side*side

volume of 1 cube  = 4*4*4

volume of 1 cube = 64 cm cube

now, volume of cuboid = 64*2 = 128 cm cube

alternate method-

we will directly find the dimensions of the cuboid and find its cube

the height and width will remain same = 4

but length will be doubled = 4*2 = 8

now, volume of cuboid = length*breadth*height

= 8*4*4

volume of cuboid = 128 cm cube

hope it helps

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