NCERT Solutions for Class 9 Maths Chapter 13 Exercise 13.9 Solutions

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NCERT Solutions for Class 9 Maths Chapter 13 Exercise 13.9 Solutions are based on the description of the construction of various objects, like cube, cuboid, sphere, cylinders and more. It covers the summary of the topic.

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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.
    Prove that : \(\sqrt{\frac{1 - \cos A}{1 + \cos A}} = \frac{\tan A}{\sec A + 1}\).


      • 2.
        In a circular museum hall of radius 14 m, some statues are displayed. Statues are kept inside the inner concentric circle of radius 7 m. One such statue lying in sector OAB, is fenced along line segments OA, AP, PB and BO where P is a point on outer circle. Based on above information, answer the following questions:

        37(i) Find \(m\angle AOP\).


          • 3.
            In the given figure, \(\Delta ABC\) is a right-angled triangle with \(\angle A = 90^\circ\). AD is perpendicular to BC.

            35(a)(i) Prove that \(\Delta DBA \sim \Delta DAC\)


              • 4.
                \(17 \times 11 \times 13 + 11\) is

                  • a prime number.
                  • multiple of 17.
                  • a composite number.
                  • an odd number.

                • 5.
                  Seema daily goes to a park to exercise on machines available there. When Seema spent 15 minutes on exercise bicycle and 30 minutes on double cross walker, she received a message of burning 435 calories on her fitness watch. When she spent 30 minutes on exercise bicycle and 40 minutes on double cross walker, she received a message of burning 690 calories. Based on above information, answer the following questions:

                  38(i) Represent the above situation in terms of a pair of linear equations in two variables.


                    • 6.
                      In the given figure, two triangles ABC and PQR are shown such that \(\angle A = \angle P\) and \(\angle C = \angle R\). If \(AD \perp BC\) and \(PS \perp QR\), then prove that (i) \(\Delta ADB \sim \Delta PSQ\) (ii) \(AD \times QS = BD \times PS\).

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