NCERT Solutions for Class 9 Maths Chapter 13 Exercise 13.3 Solutions

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NCERT Solutions for Class 9 Maths Chapter 13 Exercise 13.3 Solutions are based on the concept of Surface area of a right circular cone.

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Read More: NCERT Solutions For Class 9 Maths Chapter 13 Surface Areas and Volumes

Exercise Solutions of Class 9 Maths Chapter 13 Surface Areas and Volumes

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CBSE X Related Questions

  • 1.
    Assertion (A) : If probability of happening of an event is \(0.2p\), \(p>0\), then \(p\) can't be more than 5.
    Reason (R) : \(P(\bar{E}) = 1 - P(E)\) for an event \(E\).

      • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
      • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
      • Assertion (A) is true, but Reason (R) is false.
      • Assertion (A) is false, but Reason (R) is true.

    • 2.
      Assertion (A) : \((\sqrt{3} + \sqrt{5})\) is an irrational number.
      Reason (R) : Sum of the any two irrational numbers is always irrational.

        • Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
        • Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
        • Assertion (A) is true, but Reason (R) is false.
        • Assertion (A) is false, but Reason (R) is true.

      • 3.
        A conical cavity of maximum volume is carved out from a wooden solid hemisphere of radius 10 cm. Curved surface area of the cavity carved out is (use \(\pi = 3.14\))

          • \(314 \sqrt{2}\) \(\text{cm}^{2}\)
          • \(314\) \(\text{cm}^{2}\)
          • \(\frac{3140}{3}\) \(\text{cm}^{2}\)
          • \(3140 \sqrt{2}\) \(\text{cm}^{2}\)

        • 4.
          The dimensions of a window are 156 cm \(\times\) 216 cm. Arjun wants to put grill on the window creating complete squares of maximum size. Determine the side length of the square and hence find the number of squares formed.


            • 5.
              The graph of \(y = f(x)\) is given. The number of zeroes of \(f(x)\) is :

                • 0
                • 1
                • 3
                • 2

              • 6.
                Prove that \(2 + 3\sqrt{5}\) is an irrational number given that \(\sqrt{5}\) is an irrational number.

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