Question

The radius of cylinder is 10.5cm and height is 18cm. Find it's curved surface area.

Answer 1

Question

The radius of cylinder is 10.5cm and height is 18cm .

To find = C.S.A of cylinder...

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FORMULA=

C.S.A= 2πrh

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SOLUTION====

In Question

r=10.5cm ....

h=18cm [given]...

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Now put the values in formula

C.S.A= 2πrh

------ = 2×22/7×10.5×18

------ =2×22×1.5×18

------ = 2×22×3×9

------- =132×9

------- = 1188cm²

Answer 2

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Given

The radius of cylinder = 10.5 cm

and Height of cylinder = 18cm ..

As we know the formula to find the cylinder curved surface area = 2πrh ..

So ,

C.S.A= 2πrh

= 2×22/7×10.5×18 =2×22×1.5×18
= 2×22×3×9
=132
= 1188cm²

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