Question

A right circular cylinder has radius 3.5cm and height 10 cm. Its total surface area

is​

Answer 1

Step-by-step explanation:

radius of cylinder=3.5cm

h=10cm

2πr(r+h)

=2×22/7×3.5×(3.5+10)

=44×0.5(13.5)

=297cm²

Answer 2

Answer:-

Total surface area of the cylinder is 297 cm²

Explanation:-

Given:-

• Radius of the right circular cylinder is 3.5 cm and

• Height of the cylinder is 10 cm

To find:-

Find the total surface area of the right circular cylinder

Solution:-

Radius of the cylinder ( r ) = 3.5 cm

Height of the cylinder ( h ) = 10 cm

We know that,

${\underline{\boxed{\sf{Total\:surface\:area\:of\:cylinder=2πr(h+r)}}}}$

$\sf{:\implies T. S.A\:of\:the\:cylinder=2×\dfrac{22}{7}×3.5(10+3.5)\:cm^{2}}$

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$\sf{:\implies T. S.A\:of\:the\:cylinder=\dfrac{44}{7}×3.5×13.5\:cm^{2}}$

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$\sf{:\implies T. S.A\:of\:the\:cylinder=\dfrac{44}{7}×\dfrac{35}{10}×\dfrac{135}{10}\:cm^{2}}$

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$\sf{:\implies T. S.A\:of\:the\:cylinder=27×11\:cm^{2}}$

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$\sf{:\implies T. S.A\:of\:the\:cylinder=297\:cm^{2}}$

Total surface area of the right circular cylinder is 297 cm²

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