(B) Given diameter $d = 28 \, cm$,so radius $r = \frac{d}{2} = 14 \, cm$. Surface area of a sphere $= 4 \pi r^2 = 4 \times \frac{22}{7} \times 14 \tim

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$2464 \, cm^2, 11498 \frac{2}{3} \, cm^3$

(B) Given diameter $d = 28 \, cm$,so radius $r = \frac{d}{2} = 14 \, cm$. Surface area of a sphere $= 4 \pi r^2 = 4 \times \frac{22}{7} \times 14 \times 14 = 88 \times 28 = 2464 \, cm^2$. Volume of a sphere $= \frac{4}{3} \pi r^3 = \frac{4}{3} \times \frac{22}{7} \times 14 \times 14 \times 14 = \frac{4}{3} \times 22 \times 2 \times 14 \times 14 = \frac{34496}{3} = 11498 \frac{2}{3} \, cm^3$.

Class 9 Mathematics Surface Areas and Volumes Mix Examples - Surface Areas and Volumes

Medium

Find the surface area and volume of a sphere of diameter $28 \, cm$.

A
$2464 \, cm^2, 11498.67 \, cm^3$
B
$2464 \, cm^2, 11498 \frac{2}{3} \, cm^3$
C
$1232 \, cm^2, 5749 \frac{1}{3} \, cm^3$
D
$2464 \, cm^2, 11500 \, cm^3$

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Surface Areas and Volumes

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Mix Examples - Surface Areas and Volumes

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Find the surface area and volume of a sphere of diameter $28 \, cm$.

Similar Questions

The surface area of a sphere is $2464 \, cm^2$. Find its diameter in $cm$.

The ratio of radii of two cylinders with equal height is $4:5$. What is the ratio of their volumes?

$A$ cone is $8.4 \, cm$ high and the radius of its base is $2.1 \, cm$. It is melted and recast into a sphere. The radius of the sphere is (in $cm$):

The radii of two cylinders are in the ratio $3:2$ and their heights are in the ratio $8:11$. The ratio of their volumes is....... .

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