EASY
9th CBSE
IMPORTANT
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Find the surface area of a sphere of a diameter 21 cm.( in cm2).
 

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Important Questions on Surface Area and Volume of a Sphere

EASY
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 2

 Find the surface area of a sphere of a diameter 3.5 cm( in cm2).
 

MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 3
Find the total surface area of a hemisphere and a solid hemisphere each of radius 10 cm ( Use π=3.14).
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 4
The surface area of a sphere is 5544 cm2, find its diameter.( in cm).
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 5
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 ₹ 4 per 100 cm2.
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 6
The dome of a building is in the form of a hemisphere. Its radius is 63 dm. Find the cost of painting it at the rate of ₹ 2 per sq.m.
HARD
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 7
Assuming the earth to be a sphere of radius 6370 km, how many square kilometers is area of the land, if three-fourth of the earth's surface is covered by water?
HARD
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 8
A cylinder of same height and radius is placed on the top of a hemisphere. Find the curved surface area of the shape if the length of the shape be 7 cm. 
MEDIUM
9th CBSE
IMPORTANT
Mathematics Class 9>Chapter 21 - Surface Area and Volume of a Sphere>EXERCISE>Q 9
The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surfcae areas.