Question

The hight of a cylinder is 18cm & the radias of the bass is 7cm. What is total surface area​

Answer 1

Question :

The height of a cylinder is 18cm & the radius of the bass is 7cm. What is total surface area ?

Answer :

$\sf\pink{Given:}$

• $\bf\red{Height\:of\:cylinder\:is\:18 cm .}$

• $\bf\red{Radius\:of\:the\:base\:is\:7\:cm .}$

$\sf\pink{To\:find:}$

• $\bf\blue{Total\:surface\:area\:of\: the\:cylinder ?}$

Explanation :

$\bf\purple{Total\: Surface\: Area = 2\pi r (h + r)}$

$\bf\purple{Total\: Surface\: Area = 2\times \dfrac{22}{7}\times 7\times ( 18 + 7) }$

$\bf\purple{Total\: Surface\: Area = 2\times \dfrac{22}{7}\times 7\times 25 }$

$\bf\purple{Total\: Surface\: Area = 2\times 22\times 25 }$

$\bf\purple{Total\: Surface\: Area = 44\times 25 }$

$\bf\purple{Total\: Surface\: Area = 1100}$

• Therefore total surface area of the cylinder is 1100 cm²

$\bf{\colorbox{pink}{@itsbrainlygenius}}$

Answer 2

Answer:

1100 cm^2

Step-by-step explanation:

Total surface area of a cylinder= 2πr( h + r )

                                                    = 2 x 22 x 7 ( 18 + 7 )

                                                               7

                                                     = 44 x ( 25 )

                                                     =1100