Example 9 - The hollow sphere in which circus motorcyclist - Examples

  1. Chapter 13 Class 9 Surface Areas and Volumes
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Example 9 : The hollow sphere, in which the circus motorcyclist performs his stunts, has a diameter of 7 m. Find the area available to the motorcyclist for riding. Diameter of the sphere = 7 m. Radius = r = 7/2 m = 3.5 m Area available to motorcyclist for riding = Area of sphere = 4πr2 = 4 × 22/7 × 3.5 × 3.5 m2 = 154 m2

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  • kavita mudgil15's image
    kavita mudgil15
    Nov. 7, 2017, 9:46 a.m.

    The curved surface Area of a cone exceeds the base area by 88cm. Its slant height exceeds the base radius by 4 CM.  Find the radius of the  base. 

    View answer
  • kavita mudgil15's image
    kavita mudgil15
    Nov. 7, 2017, 9:45 a.m.

    The curved surface Area of a cone exceeds the base area by 88cm. Its slant height exceeds the base radius by 4 CM.  Find the radius of the  base. 

    View answer