Question

1). Find the volume of a right circular cylinder of radius 2.8 m and height 3.5 m.

2). Find the volume of a cylinder having a height of 21 cm and an area of base as 138 cm².

3). A hollow cylindrical tube is 3.5 m long. If its inner and outer radii are 7 cm and 77 cm respectively, then find the volume of the material used in making the pipe.

4). The volume of a cylindrical vessel is 770 cm. If its radius is 7 cm, then find its height and area of the base.

5. A metal pipe is 14 m long. If the its internal and external diameters are 2 m and 16 m respectively, then find the volume of the pipe.

6). Find the number of coins 2 cm in diameter and 0.5 cm thick to be melted to form a right circular cylinder
of height 10 cm and radius 3.5 cm.

7). A 35 cm high cylindrical vessel having a base radius of 100 cm is full of juice. If the juice is poured into an
empty rectangular vessel of length 20 cm and breadth 11 cm and filled it completely, then find the height.

plz tell answer.....

tell only answer plz........ ​

Answer 1

Answer:

1) 30.8 cm^2 2) 2898cm^2 3) 102703.13 cm^2 4) 5m, 154m^2 5) 31 coins