8. A cylindrical container is 84 cm high and has base radius of 4.2 cm. Find the cost of painting its curved
8 per 100 sq cm. 177.41
surface at the rate of 8
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Answer:
Height of cylinder=84cm
Radius of base=4.2cm
CSA of cylinder=2πrh
=2×22/7×4.2×84
2×22/7×42/10×84
22176/10
Cost of painting=₹8×22176/10×100
=177408/1000= ₹177.408
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