Question

find the total surface area of a closed cylindrical drum if its diameter is 50 cm and height is 45 CM (pi is = 3.14)​

Answer 1

$Diameter =50 cm$

$Radius = 25 cm$

$Hieght = 45 cm$

$Total \: Surface \: Area = 2 π r (h+r)$

$= 2 × 3.14 × 25 (25+45)$

$=10990 cm²$

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