Question

1. The surface areas of two Spheres are in the ratio 16 : 27. Find the ratio of their volumes

2. Find the total surface area of a hemisphere of radius 7 cm

3. Two cones have their heights in the ratio 1:3 and radii 3:1. What is the ratio of their volumes ?

4. If the total surface area of a solid hemisphere is 462 cm2

, find its volume.

5. What is the volume of a right circular cylinder of base radius 7 cm and height 10 cm ?

6. The surface area of a sphere is 616 cm2

. Find its radius.

7. The diameter of a sphere is 6 cm. It is melted into a wire of diameter 2mm. Find the length of the wire

8. Find the curved surface area of a right circular cone of height 15 cm and base diameter 16 cm.


Level – 2


1. A cylinder, a cone and hemisphere are of same base and of same height. Find the ratio of their volumes.

2. A solid piece of iron in the form of a cuboid of dimensions 49 cm × 33 cm × 24 cm is `moulded to form a

solid sphere. Find the radius of the sphere.

3. Total surface area of a cube is 216 cm2

. Find its volume.

4. Volumes of two spheres are in the ratio 64:27. What is the ratio of their surface areas ?

5. Two cubes of 5 cm each are kept together joining edge to edge to form a cuboid. Find the surface area of the

cuboid so formed

6. A heap of rice is in the form of a cone of diameter 9m and height 3.5m. Find the volume of the rice. How

much canvas cloth is required to cover the heap?

7. The diagonal of a cube is 27√3 cm. Find ifs surface area

8. Three metallic solid cubes whose edges are 3 cm, 4 cm and 5 cm are melted and converted into a single cube.

Find the edge of the cube so formed.



please answer all....
I will mark as brainliest ​

Answer 1

Answer:

India, officially the Republic of India, is a country in South Asia. It is the second-most populous country, the seventh-largest country by land area, and the most populous democracy in the world. Wikipedia

Prime minister: Narendra Modi Trending

Capital: New Delhi

Date format: : dd-mm-yyyy;

President: Ram Nath Kovind

Population: 136.64 crores (2019) World Bank

Explanation: