The internal and external diameters of a hollow hemispherical vessel are 20 cm and 28 cm respectively. Find the cost of painting the vessel all over at 14 paise per cm square.
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(S.A. of small +S.A. of big hemisphere + area of rim )×14÷ 100=Rs. 175.12
shobhapawar92p232rd:
What is the area of rim in this question.
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