A man covers a certain distance by a train running at 72 km/hr in 8 hours. If he wants to cover the same distance in 6 hours, what should be the speed of the train?

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…