Q.A bucket has top and bottom diameters of 40cm and 20cm respectively.Find the volume of the bucket if its depth is 12cm.Also,find the cost of tin sheet used for making the bucket at the rate of Rs.1.20 per dm^2.
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Volume of bucket =31π Height (Rtop2+RtopRbottom+Rbottom2) =31π×12(202+20×10+102)=8800cm3
Slant height, l=(20−10)2+122=15.62cm
T.S.A =π(Rtop+Rbottom)l+π(Rtop2+Rbottom2)=3044.171cm2
Cost=120×30.44171=Rs.3653
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