The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

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Solution

Radius (r₁) of spherical balloon = 7 cm

Radius (r₂) of spherical balloon, when air is pumped into it = 14 cm

Therefore, the ratio between the surface areas in these two cases is 1:4.

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The radius of a spherical balloon increases from 7 cm to14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

Q. The radius of a spherical balloon increases from

7

cm to

14

cm as air is being pumped into it. Find ratio of surface areas of the balloon in the two cases.

Q. The radius of a spherical balloon increases from

7 c m

14 c m

as air is being pumped into it. Find the ratio of volumes of the balloon in the two cases.

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The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases.

Radius (r1) of spherical balloon = 7 cm Radius (r2) of spherical balloon, when air is pumped into it = 14 cm Therefore, the ratio between the surface areas in these two cases is 1:4.

Radius (r₁) of spherical balloon = 7 cm

Radius (r₂) of spherical balloon, when air is pumped into it = 14 cm

Therefore, the ratio between the surface areas in these two cases is 1:4.