Ex 11.2 (Q4 to Q9) Surface Areas and Volumes Class 9 Maths Ncert New Book | Ex 13.4 Class 9th Maths. скачать в хорошем качестве

Ex 11.2 (Q4 to Q9) Surface Areas and Volumes Class 9 Maths Ncert New Book | Ex 13.4 Class 9th Maths.

Ex 11.2 (Q4 to Q9) Surface Areas and Volumes Class 9 Maths Ncert New Book | Ex 13.4 Class 9th Maths. 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...   You can directly click here👇 for fulll 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 Exercise 11.2 chapter 11 Surface area and volume and solved Question 4 to Question number 9 from NCERT Mathematics class 9 based on new syllabus prescribed in new book. In old NCERT book it is given under chapter 13 and exercise 13.4 Q4. The radius of a spherical balloon increases from 7 cm to 14 cm as air is being pumped into it. Find the ratio of surface areas of the balloon in the two cases. Q5. 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 Rs16 per 100 cm² Q6. Find the radius of a sphere whose surface area is 154 cm² Q7. The diameter of the moon is approximately one fourth of the diameter of the earth. Find the ratio of their surface areas. Q8. A hemispherical bowl is made of steel, 0.25 cm thick. The inner radius of the bowl is 5 cm. Find the outer curved surface area of the bowl. Q9. A right circular cylinder just encloses a sphere of radius r (see Fig. 11.10). Find (i) surface area of the sphere, (ii) curved surface area of the cylinder, (iii) ratio of the areas obtained in (i) and (ii) #9thmaths #surfaceareasandvolumes #mensuration #class9maths #ncertmathsclass9 #class9thmaths #surfaceareandvolume #maths #sphere #hemisphere #cone #9maths #mukeshmaths8and9