Question

The total surface area of a solid cylinder is 660 sq.cm . If its diameter of the base is 14 cm .Find the curved surface area of the cylinder......??​

Answer 1

Answer:

2πr(h+r)= 660

22(h+7)=330

h+7=330/22

h+7=15

h= 8

CSA = 2πrh

you can find it

Answer 2

Curved surface area is 352 sq. cm.

Step-by-step explanation:

Since we have given that

Total surface area of solid cylinder = 660 sq. cm

Diameter of solid cylinder = 14 cm

Radius of solid cylinder = 7 cm

As we know the formula:

$660=2\pi r(r+h)\\\\660=2\times \dfrac{22}{7}\times 7(7+h)\\\\660=44(7+h)\\\\\dfrac{660}{44}=7+h\\\\15=7+h\\\\h=15-7=8\ cm$

So, curved surface area of cylinder would be

$2\pi rh\\\\=2\times \dfrac{22}{7}\times 7\times 8\\\\=44\times 8\\\\=352\ sq.\ cm$

Hence, curved surface area is 352 sq. cm.

# learn more:

The curved surface area of a cylinder is 660 cm square. If the diameter of the base is 14 cm , find the volume of the cylinder

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