2. Questions Bank
  3. 10th Class
  4. Mathematics
  5. Mensuration

10th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    A unit cube is cut into two equal halves by a plane section parallel to one of its faces. The total surface area of both the halves is

    A)  6 sq cm            

    B)         7 sq cm

    C)  8 sq cm                 

    D)  9 sq cm

    Correct Answer: C

    Solution :

     Initially, \[l=1,\,b=1,\,h=1\] When the cube is cut into two halves, then for each half, \[l=\frac{1}{2},\,b=1,h=1\] \[\therefore \]  Total surface area of both the halves                 \[=2(lb+bh+hl)+2(lb+bh+hl)\] \[=4\left( \frac{1}{2}\times 1+1\times 1+1\times \frac{1}{2} \right)=4\left( \frac{1}{2}+1+\frac{1}{2} \right)\]\[=8\,sq.unit\]


You need to login to perform this action.
You will be redirected in 3 sec spinner