Question

Important questions on surface area and volume please tell seriously​

Answer 1

Answer:

tell the question then only

Answer 2

Step-by-step explanation:

Surface Areas and Volumes

August 8, 2019 by Sastry CBSE

Important Questions for Class 10 Maths Chapter 13 Surface Areas and Volumes

Surface Areas and Volumes Class 10 Important Questions Very Short Answer (1 Mark)

Question 1.

A sphere of diameter 18 cm is dropped into a cylindrical vessel of diameter 36 cm, partly filled with water. If the sphere is completely submerged, then calculate the rise of water level (in cm). (2011D)

Solution:

Volume of Cylinder = Volume of Sphere

Important Questions for Class 10 Maths Chapter 13 Surface Areas and Volumes 1

Question 2.

Find the number of solid spheres, each of diameter 6 cm that can be made by melting a solid metal cylinder of height 45 cm and diameter 4 cm. (2014D)

Solution:

Number of solid spheres

Important Questions for Class 10 Maths Chapter 13 Surface Areas and Volumes 2

Question 3.

A solid right circular cone is cut into two parts at the middle of its height by a plane parallel to its base. Find the ratio of the volume of the smaller cone to the whole cone. (2012OD)

Solution:

Since the cone is cut from the middle,

Important Questions for Class 10 Maths Chapter 13 Surface Areas and Volumes 3

Question 4.

Volume and surface area of a solid hemisphere are numerically equal. What is the diameter of hemisphere? (2017D)

Solution:

Volume of hemisphere = Surface area of hemisphere …[Given

23πr3 = 2πr2 ⇒ 13r = 1

r = 3

∴ Diameter of hemisphere = 27 = 2(3) = 6 cm

Surface Areas and Volumes Class 10 Important Questions Short Answer-I (2 Marks)

Question 5.

If the total surface area of a solid hemisphere is 462 cm2, find its volume. [Take π = 227] (2014OD)

Solution:

Total surface area of hemisphere = 462 cm2

Important Questions for Class 10 Maths Chapter 13 Surface Areas and Volumes 4