NCERT

09 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.4 | Question 5

Class 9 - Sphere, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , ,

Question 5: 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 ` 16 per 100 cm2. Question 4 Question 6

Read More
09 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.4 | Question 4

Class 9 - Sphere, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , ,

Question 4: 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. Question 3 Question 5

Read More
04 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.5 | Question 9

Class 9 - Cube & Cuboid, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , , ,

Question 9: A river 3m deep and 40m wide is flowing at the rate of 2km per hour. How much water will fall into the sea in a minute? Question 8 Ex: 13.6 | Question 1

Read More
04 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.5 | Question 8

Class 9 - Cube & Cuboid, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , , ,

Question 8: A solid cube of side 12 cm is cut into eight cubes of equal volume. What will be the side of the new cube? Also, find the ratio between their surface areas. Question 7 Question 9

Read More
04 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.5 | Question 7

Class 9 - Cube & Cuboid, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , , ,

Question 7: A godown measures 40 m × 25 m × 15 m. Find the maximum number of wooden crates each measuring 1.5 m × 1.25 m × 0.5 m that can be stored in the godown. Question 6 Question…

Read More
04 Dec

Class 9 | Chapter 13 | Surface areas and Volumes | Exercise 13.5 | Question 6

Class 9 - Cube & Cuboid, Class 9 - Surface areas and Volumes, Math - Class 9 | NCERT, , , , , , , , , ,

Question 6: A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20m×15m×6m. For how many days will the water of this tank last? Question 5 Question 7

Read More