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Question -

If the volume of a cuboid is 3x2 – 27, then its possible dimensions are
(a) 3, x2, -27x
(b) 3, x – 3, x + 3
(c) 3, x2, 27x
(d) 3, 3, 3



Answer -

Volume = 3x2 -27 = 3(x2 – 9)
= 3(x + 3) (x – 3)
∴Dimensions are   = 3, x – 3, x   + 3        (b)

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