Question

A right circular cylinder whose base has a radius of 7cm
and its height is 10cm, then the C.S.A is in cm^2​

Answer 1

Answer: 440 cm^2

Step-by-step explanation:

Given,

r=7cm

h=10cm

we know that,

C.S.A of a cylinder = 2πrh

                               = 2*$\frac{22}{7}$*7cm*10cm

                               = 2*22*10 cm^2 (7 gets cancelled in numerator and denominator)

                               = 440 cm^2

Answer 2

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Q) A right circular cylinder whose base has radius of 7 cm and it's height is 10 cm , then the C.S.A. would be ?

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Concept :

• In this question , we would simply use the given values and put them in the Formula for finding the CSA to get the answer .

• CSA - It's the curved surface area , means , area of the curved surface so , the base and the top of the Cylinder is not included .

• As it's a form of area so , it's unit is → unit² .

Given :

• Radius ( r ) = 7 cm
• Height ( h ) = 10 cm
• The given shape is a right circular cylinder .

To Find :

• The CSA of Cylinder .

Solution :

Using the Formula ↓

$\boxed{ \sf \: csa = 2\pi \: rh}$

put the values ..

$\rm \mapsto \: csa = 2 \times \frac{22}{ \cancel{7}} \times \cancel7 \times 10 \: {cm}^{2}$

$\mapsto \rm \: csa = 2 \times 22 \times 10 \: {cm}^{2}$

$\mapsto \pink{ \boxed{ \rm \: csa = 440 \: {cm}^{2} \: }}$

As the values of radius and height were in cm so , we had no need to change the dimensions .

So ,

The Curved Surface Area of Cylinder in cm² would be 440 .