Question

find the volume,curved surface area and the total surface whose hieght is 10cm and radius is 3.5
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Answer 1

The volume of cylinder= πr²h

V= $\frac{22}{7} *\frac{35*35}{10*10} *10$

V = $22 * \frac{35}{10} *5\\\\22*\frac{35}{2} \\\\11*35 = 385cm^{3}$

So Volume is 385 cm³.

Curved Surface Area of Cylinder = 2πrh

CSA = $\frac{22}{7} *\frac{35}{10} *10$

 $22*5 \\\\ CSA = 110cm^{2}$

So Curved Surafce Area is 110 cm².

Total Surface Area of Cylinder=  2πr(r+h)

TSA = $2*\frac{22}{7} *\frac{35}{10} ( 3.5 +10)$

 $TSA = 2*22*\frac{1}{2} ( 13.5)\\ = 2*11*\frac{135}{10} \\= 11*\frac{135}{5} \\= 11* 27 \\= 297 cm^{2}$

So Total Surface area is 297cm².

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Answer 2

Answer:

h=10

r=3.5

π=22/7

1] volume = πr²h

v=22/7^(3.5)²^10

v=22/7^12.25^10

v=22^1.75^10

v=385

2] curved surface area =2πrh

= 2^22/7^3.5^10

= 44/7^3.5^10

=44^0.5^10

=220

3] total surface area = 2πr(r+h)

=2^22/7^3.5(3.5+10)

=44/7^3.5^13.5

= 44^0.5^13.5

=297

hope this will help you..