Ex 11.4 (Q5 to Q10) Surface Areas and Volumes Class 9 Maths Ncert New Book

Описание: ✅Ex 11.4 (Q5 to Q10) Surface Areas and Volumes Class 9 Math's Ncert New Book

✅You can directly click here👇 for full chapter's Playlist Class 9th Ch:11 Surface Areas and Volumes Ncert New Syllabus:
• Class 9th Math's Chapter 11 Surface Areas

✅In this video we have solved Exercise 11.4 Chapter 11 Surface area and volume and solved Question 1 to Question number 4 from NCERT Mathematics class 9 based on new syllabus prescribed in new ncert book.

Q5. How many liters of milk can a hemispherical bowl of diameter 10.5 cm hold?

Q6. 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.

Q7. Find the volume of a sphere whose surface area is 154 cm².

Q8. A dome of a building is in the form of a hemisphere. From inside, it was white washed at the cost of Rs 4989.60. If the cost of white washing is Rs 20 per square meter, find the
(i) inside surface area of the dome,
(ii) volume of the air inside the dome

Q9. 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′.

Q10. 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?

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