Question

the surface area of cylinder is 4620cm and its radius is 21cm find its height​

Answer 1

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Surface Area of a Cylinder = 2 π r ( h + r )

4620 = 2πr (h+r)

2310 = (22/7) 21 ( h + 21 )

2310 = (22 × 3) ( h + 21 )

2310 = 66 ( h + 21 )

h + 21 = 35

h = 35 - 21

Height of the Cylinder = 14 cm