Question

Find the height of the cylinder whose diameter is 42cm and total surface area is 4092cm square

I want in steps

Answer 1

Diameter = 42 cm

Radius = 21 cm

Total surface area of a cylinder = 2πr (r+h)

4092 = 2×22/7×21 (21+h)

4092 = 132 (21+h)

4092/132 =(21+h)

31=(21+h)

31-21= h

h = 10 cm

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Answer 2

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