A certain sum of money triples itself in 10 years at simple interest. In how many years will it become 6 times?

The length, breadth and height of a box are respectively 14 m, 12 m and…

The volume of the material of a hemispherical shell with outer and inner radii 9…

The ratio of surface area to diameter of a sphere whose volume is 36π cubic…

A cylindrical tube open at both ends is made of metal. The internal diameter of…

The volume of a right circular cone of height 3 cm and slant height 5…