Table of Contents
Ans.(b) 14
Explanation:
Surface area of sphere = katex is not defined
So, the diameter = 2r = 2 × 7 = 14 cm.
Ans. (b) 1:64
Explanation:
The diameter of Moon is approximately one fourth of the diameter of Earth.
Let, Radius of Moon = r,
Then, Radius of Earth = 4r
katex is not defined
= 1:64
Explanation:
Given, Area of the roof = 22 m × 20 cm
Height of cylindrical vessel = 3.5 m
Diameter of the vessel = 2 m
∴ Radius of the vessel = 1 m
Let the total rainfall be h m.
∴ Volume of rain water collected on the roof
= volume of the cylindrical vessel
katex is not defined
Explanation:
Given, internal diameter of sphere = 6 cm
External diameter of sphere = 10cm
Base diameter of cylinder = 14 cm
Thus, internal radius of sphere ,katex is not defined
External radius of sphere katex is not defined
Base radius of cylinder, r = 7 cm
Let the height of the cylinder be h cm.
Thus, volume of cylinder = Volume of spherical shell
katex is not defined
Explanation:
Ans. Given, Diameter of the cylinder = 12 cm
∴ Radius = 6 cm
Height of the cylinder = 15 cm
Number of toys = 12
Let the radius of the hemisphere be r cm
Thus, height of the cone = 3r cm
Now, volume of cylinder = katex is not definedkatex is not definedkatex is not definedNow, total volume of 12 toys
= 12 [volume of hemisphere + volume of cone]
Thus, total volume of 12 toys
katex is not defined⇒ r = 3 cm
Thus, radius of the hemisphere = 3 cm and height of the cone = (3)(3) cm =9 cm
∴ Total height of the toy
= (9 + 3) cm = 12 cm.
Chapter No. | Chapter Name |
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Chapter 1 | Real Numbers |
Chapter 2 | Polynomials |
Chapter 3 | Pair of Linear Equations in Two Variable |
Chapter 4 | Quadratic Equations |
Chapter 5 | Arithmetic Progressions |
Chapter 6 | Triangles |
Chapter 7 | Coordinate Geometry |
Chapter 8 | Introduction to Trigonometry |
Chapter 9 | Some Applications of Trigonometry |
Chapter 10 | Circles |
Chapter 11 | Areas Related to Circle |
Chapter 12 | Surface Areas and Volumes |
Chapter 13 | Statistics |
Chapter 14 | Probability |
Chapter Wise Important Questions for CBSE Board Class 10 Maths |
---|
Real Numbers |
Polynomials |
Pair of Linear Equations in Two Variables |
Quadratic Equations |
Arithmetic Progressions |
Triangles |
Coordinate Geometry |
Introduction to Trigonometry |
Some Applications of Trigonometry |
Circles |
Areas Related to Circles |
Surface Areas and Volumes |
Statistics |
Probability |
CBSE Important Questions Class 10
ICSE Important Questions Class 10
CBSE Important Questions Class 10
ICSE Important Questions Class 10