the outer and inner diameters of a hemispherical bowl 17cm and 15 cm find the cost of polishing it over at 25 Paise per cm2
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The polishing will be to the outer bowl. Therefore we have to find curved area of hema spherical bowl
curved area=2πrsqaure
=2*22/7*15*15=1413.71
cost for polishing=1413.71*25=35342.75paise
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