Can you explain the answer of this question below:
The volume of cuboid is given by the expression x3+2x2-x-2. The dimension of the cuboid for x = 5 is:​
  • A:
    4×6×7
  • B:
    2×3×4
  • C:
    5×6×7
  • D:
    6×7×8
The answer is a.
Related Test: Test: Factorisation

Class 9 Question

5 Answers
Arzoo Sharma answered Sep 02, 2018
There is problem in q I think you should also give the ratio of length, breadth and height. ( upvote if agree )

Archish Kansal answered May 21, 2018
For x=5, Volume is: 5^3 + 2(5^2) - 5 - 2 = 125 + 50 - 5 - 2 = 168
As, volume of cuboid = l x b x h, therefore, dimensions = 4 x 6 x 7.


Achal Chinavalkar answered Sep 12, 2018
X=5
x3 2x2-x-2
= 5^3 2*5^2-5-2
=125 50-7
=118 50
=168

option a ) 4*6*7=168 therefore a is answer

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