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List of top Mathematics Questions on Surface Area of a Sphere
The rate of change (in cm2/s) of the total surface area of a hemisphere with respect to the radius r at r = 3.
CUET (UG) - 2024
CUET (UG)
Mathematics
Surface Area of a Sphere
The rate of change of surface area of a sphere with respect to its radius \( r \), when \( r = 4 \, {cm} \), is:
CBSE Class XII - 2024
CBSE Class XII
Mathematics
Surface Area of a Sphere
The surface area (in
\(m^2\)
) of a sphere of radius 7 cm is :(Use
\(\pi= \frac{22}{7}\)
)
CUET (UG) - 2023
CUET (UG)
Mathematics
Surface Area of a Sphere
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.
CBSE Class IX
Mathematics
Surface Area of a Sphere
Find the surface area of a sphere of radius:
(i)
10.5 cm
(ii)
5.6 cm
(iii)
14 cm
CBSE Class IX
Mathematics
Surface Area of a Sphere
Find the surface area of a sphere of diameter:
(i) 14 cm
(ii) 21 cm
(iii) 3.5 m
CBSE Class IX
Mathematics
Surface Area of a Sphere
Find the total surface area of a hemisphere of radius 10 cm. (Use
\(\pi\)
= 3.14)
CBSE Class IX
Mathematics
Surface Area of a Sphere
A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of tin-plating it on the inside at the rate of ₹ 16 per 100 cm
2
.
CBSE Class IX
Mathematics
Surface Area of a Sphere
Find the radius of a sphere whose surface area is 154 cm
2
CBSE Class IX
Mathematics
Surface Area of a Sphere
The diameter of the moon is approximately one-fourth of the diameter of the earth. Find the ratio of their surface area.
CBSE Class IX
Mathematics
Surface Area of a Sphere
A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved surface area of the bowl.
CBSE Class IX
Mathematics
Surface Area of a Sphere
A right circular cylinder just encloses a sphere of radius r (see given 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)
.
CBSE Class IX
Mathematics
Surface Area of a Sphere