Multiple Choice Questions on If the ratio of the radius of the base of a right circular cone to its slant height is 1 3 what is t........... for CDS Exam Preparation

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Multiple Choice Questions

If the ratio of the radius of the base of a right circular cone to its slant height is 1 3 what is t...........

Quantitative Aptitude (CDS) Mensuration 2D
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    If the ratio of the radius of the base of a right circular cone to its slant height is 1 : 3, what is the ratio of the total surface area to the curved surface area?

     

    5 : 3

    Incorrect Answer

    3 : 1

    Incorrect Answer

    4 : 1

    Incorrect Answer

    4 : 3

    Correct Answer
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    Explanation:

    r =1 ,  l =3

    Ratio of total surface area to curved surface rea = (πr2+ πrl)/ πrl = πr2/ πrl + 1 = r/l +1 = 1/3 + 1 = 4/3 Required ratio = 4:3

    By: Munesh Kumari
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