Curved surface area CSA

A cylinder 5cm high has a base radius(7/2) cm. Calculate the curved surface area.

Correct result:

S =  109.956 cm

Solution:

h=5 cm r=7/2=72=3.5 cm  S=2π⋅ r⋅ h=2⋅ 3.1416⋅ 3.5⋅ 5=109.956 cmh=5 \ \text{cm} \ \\ r=7/2=\dfrac{ 7 }{ 2 }=3.5 \ \text{cm} \ \\ \ \\ S=2 \pi \cdot \ r \cdot \ h=2 \cdot \ 3.1416 \cdot \ 3.5 \cdot \ 5=109.956 \ \text{cm}

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