2. Questions Bank
  3. 7th Class
  4. Mathematics
  5. Mensuration

7th Class Mathematics Mensuration Question Bank Mensuration

  • question_answer
    DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?Assertion A? and the other labelled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion: Area of the equilateral triangle whose one side is 7 cm, is \[21.22\,c{{m}^{2}}.\] Reason: Area of the equilateral triangle is given as \[\frac{\sqrt{3}}{4}\times {{(side)}^{2}}.\]

    A) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.

    B) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.

    C) If Assertion is correct but Reason is incorrect.

    D) If Assertion is incorrect but Reason is correct.

    Correct Answer: A

    Solution :

        Both assertion and reason are correct. Also, reason is correct explanation for the assertion. Assertion: Area of\[\Delta =\frac{49\sqrt{3}}{4}=\frac{49\times 1.732}{4}\]    \[=\frac{84.868}{4}=21.21\,c{{m}^{2}}\]


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