Class 9 Maths Full exercise 11.4 Surface Areas and Volume | Class 9th Ex 11.4 Ncert solutions
Class 9 Maths Full exercise 11.3 Surface Areas and Volume | Class 9th Ex 11.3 Ncert solutions Full Ex-11.1 • Class 9th Maths Full Exercise 11.1 chapter... Full Ex- 11.2 • Class 9th Maths exercise 11.2 Surface Area... Full Ex-11.3 • Class 9 Maths Full exercise 11.3 Surface A... Full Ex-11.4 • Class 9 Maths Full exercise 11.4 Surface A... 👉full chapter's Playlist Class 9th Ch:11 Surface Areas and Volumes Ncert New Syllabus: • Class 9th Maths Chapter 11 Surface Areas ... In this video we have solved full Exercise 11.4 Chapter 11 surface areas and volumes from New NCERT according to new syllabus prescribed by cbse Mathematics class 9th Book and in the old NCERT Maths it is given under chapter 13 and exercise 13.8 00:00 Introduction 00:06 Q.1 Find the volume of a sphere whose radius is (i) 7 cm (ii) 0.63 m 05:27 Q.2. Find the amount of water displaced by a solid spherical ball of diameter (i) 28 cm (ii) 0.21 m 12:09 Q.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? 16:24 Q.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? 22:06 Q.5. How many litres of milk can a hemispherical bowl of diameter 10.5 cm hold? 25:38 Q.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. 33:01 Q7. Find the volume of a sphere whose surface area is 154 cm² 36:37 Q.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 Rs 20 per square metre, find the (i) inside surface area of the dome, (ii) volume of the air inside the dome. 44:42 Q.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′. 48:58 Q.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? #sphere #hemisphere #volumeofsphere #volume #cone #volumeofcone #9thmaths #class9maths #ncertmathsclass9 #mathematicsclass9 #maths #Surfaceareandvolume #mensuration #surfaceareasandvolumes #cbseclass9
