find a circular sheet of radius 10cm a disc of radius 3cm is cut out and the portion of the sheet left behind is painted at the rate of o.35/cm2 find the cost of painting sheet
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Area of sheet left = Area of original sheet - Area of the cut out portion
= 100π - 9 π
=91π
Cost = (91×22×0.35)/7
=100.10
= 100π - 9 π
=91π
Cost = (91×22×0.35)/7
=100.10
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