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Cube and Cuboid and Its Surface Areas

Question 9 iA...

Question

Question 9 (i)
A right circular cylinder just encloses a sphere of radius 'r' (see figure). Find:

(i) the surface area of the sphere,

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Solution

(i) Surface area of the sphere $= 4 π r^{2}$ (Given radius= r)

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Question 9 (ii)
A right circular cylinder just encloses a sphere of radius r (see figure). Find:

(ii) curved surface area of the cylinder.

A right circular cylinder just encloses a sphere of radius r (see figure). Find

(i) surface area of the sphere,

(ii) curved surface area of the cylinder,

(iii) ratio of the areas obtained in (i) and (ii).

Q. A right circular cylinder just encloses a sphere of radius

r

(see figure). Find the
(i) surface area of the sphere,
(ii) curved surface area of the cylinder and (iii) ratio of the surfaces obtained in (i) and (ii).

Question 9 (ii)
A right circular cylinder just encloses a sphere of radius r (see figure). Find:

(ii) curved surface area of the cylinder.

Question 9 (iii)
A right circular cylinder just encloses a sphere of radius r (see figure). Find:

(iii) the ratio of the areas obtained in (i) and (ii).

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Cube and Cuboid and Its Surface Areas

Standard X Mathematics

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