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  4. Quantitative Aptitude
  5. Mensuration

Railways Quantitative Aptitude Mensuration Sample Paper Mensuration Sample Test Paper-16

  • question_answer
    A room of size 6.75 m long and 5.75 m wide is to be paved with square tiles. The minimum number of square tiles required is

    A)  630                 

    B)  430

    C)  621                 

    D)  421

    Correct Answer: C

    Solution :

    [c] Length of room = 6.75 m = 675 cm Breadth of room = 5.75 m = 575 cm Square tiles are to be used to pave the room. The side of the square (tile) must be a factor of both length & breadth of the room \[\therefore \] HCF of 675 and 575 = 25 cm \[\therefore \] \[No\,\,o\text{f}\,\,tiles=\frac{Area\,\,o\text{f}\,\,room}{Area\,\,o\text{f}\,\,\text{one tile}}\] \[No\,\,o\text{f}\,\,tiles=\frac{675\times 575}{25\times 25}=621\]


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