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9th Class Mathematics Surface Areas and Volumes Question Bank Surface Areas and Volume

  • question_answer
    The internal and external diameters of a hallow hemispherical vessel are 22 cm and 24 cm respectively. The cost to paint 1 cm2 of the surface is Rs. 0.50. Find the total cost to paint the vessel all over.

    A)  Rs. 669                                                            

    B)  Rs. 869       

    C)  Rs. 325                                                            

    D)  Rs. 485

    E)  None of these

    Correct Answer: B

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