find the curved surface area and total surface area if radius is 1.4 CM height is 2.1 CM
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find the curved surface area and total surface area if radius is 1.4 CM height is 2.1 CM
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Verified answer
We are asked to find the CSA and
TSA of Cylinder
CSA : Curved surface area
TSA : Total surface area
Given : Radius = 1.4 cm
: Height = 2.1 cm
CSA of Cylinder = 2πrh
Let's substitute the given value
Therefore:-
[tex]CSA \: of \: Cylinder = 2πrh \\ \\ = > 2 \times \frac{22}{7} \times 1.4 \times 2.1 \\ \\ = > 2 \times 22 \times 0.2 \times 2.1 \\ \\ = > 44 \times 0.42 \\ \\ = > 18.48 \: {cm}^{2} [/tex]
[tex] \fbox \purple { Hence the CSA of Cylinder is 18.48 cm²} [/tex]
Now Let's find the TSA of Cylinder
TSA of Cylinder = 2πr ( r + h)
Let's substitute the given value:-
Therefore:-
[tex]TSA \: of \: Cylinder \: = 2πr ( r + h) \\ \\ = > 2 \times \frac{22}{7} \times 1.4(1.4 + 2.1) \\ \\ = > 2 \times 22 \times 0.2(3.5) \\ \\ = > 44 \times 0.7 \\ \\ = > 30.8 \: {cm}^{2} \: [/tex]
[tex] \fbox \red {Hence the TSA of the cylinder is 30.8 cm } [/tex]
[tex] \mathfrak \green { Mark \: It \: BRAINLIEST} [/tex]