Question

How much sq.meter of sheet required to make 50 cylinder of 20 cm height and diameter of 14 cm?

Answer 1

$\textbf {Hey there, here is the solution.}$

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STEP 1: Convert all units to m:

20 cm = 0.2 m

14 cm = 0.14 m

STEP 1: Find the radius:

Radius = Diameter ÷ 2

Radius = 0.14 ÷ 2 = 0.7 cm

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STEP 2: Find the surface area of 1 cylinder:

Surface area = 2πr² + 2πrh

Surface area = 2π (0.7)² + 2π (0.7) (0.20)

Surface area = 0.378π m²

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STEP 3: Find the area of 50 cylinders

Surface area of 1 cylinder : 0.378π cm²

Surface are of 50 cylinders = 0.378π x 50

Surface are of 50 cylinders= 18.9π m²

Surface area of 50 cylinders= 59.4 m²

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Answer: 59.4 m² of the sheet is needed to make 50 cylinder.