NCERT class 9 maths chapter 13 Surface Areas and Volumes
Question 1:Find the volume of a sphere whose radius is (i) 7 cm (ii) 0.63 m
Exercise 13.8 maths class 9 Chapter 13 Surface Areas and Volumes
Question 2:Find the amount of water displaced by a solid spherical ball of diameter (i) 28 cm (ii) 0.21 m
CBSE class 9 maths ncert solutions Chapter 13
Question 3:The diameter of a metallic ball is 4.2 cm. What is the mass of the ball, if the density of the metal is 8.9 g per cm3?
class 9 maths solutions Surface Areas and Volumes
Question 4:The diameter of the moon is approximately one-fourth of the diameter of the earth. What fraction of the volume of the earth is the volume of the moon?
NCERT class 9 chemistry chapter 13 exercise solutions
Question 5:How many litres of milk can a hemispherical bowl of diameter 10.5 cm hold?
Surface Areas and Volumes class 9 ncert solutions
Question 6:A hemispherical tank is made up of an iron sheet 1 cm thick. If the inner radius is 1 m, then find the volume of the iron used to make the tank.
class 9 Maths NCERT Solutions Chapter 13 Surface Areas and Volumes Exercise 13.8
Question 7:Find the volume of a sphere whose surface area is 154 cm2.
Exercise 13.8 class 9 Math ncert solutions Chapter 13
Question 8:A dome of a building is in the form of a hemisphere. From inside, it was white-washed at the cost of ` 4989.60. If the cost of white-washing is ` 20 per square metre, find the (i) inside surface area of the dome, (ii) volume of the air inside the dome.
EXERCISE 13.8Assume p =227, unless s
Question 9:Twenty seven solid iron spheres, each of radius r and surface area S are melted to form a sphere with surface area S¢. Find the (i) radius r ¢ of the new sphere, (ii) ratio of S and S¢.
Question 10:A capsule of medicine is in the shape of a sphere of diameter 3.5 mm. How much medicine (in mm3) is needed to fill this capsule?