66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be:
Let the length of the wire be h.
Radius r =1/2 mm = 1/20 cm
πr2h = 66
=> h= (66 x 20 x 20) x (7/22) = 8400cm = 84m
Find the total surface area (in sq.cm) of a right circular cylinder of diameter 21 cm and height 10 cm.
View Answer Report Error Discuss
Find the area and circumference of a circle if the radius is 14 cm. (Take pi = 22/7)
Find the curved surface area (in cm2) of a right circular cylinder of diameter 21 cm and height 10 cm.
The length, breadth and height of a cuboidal box are in the ratio 7 : 5 : 3 and its whole surface area is 27832 sq.cm. Its volume is:
Find the total surface area (in cm2) of a right circular cone of diameter 28 cm and slant height 12 cm.
If the edge of a cube is increased by 4 cm, the volume will increase by 988 . Then the original length of each edge of the cube is
Find the height of a cuboid whose volume is 330 cm2and base area is 15cm2 .
Find the volume (in cm3) of a cuboid of length, breadth and height of 7.5 cm, 5 cm and 6 cm respectively.