Mensuration Practice

A metallic cuboid of dimensions 12 cm × 8 cm × 6 cm is melted and recast into cubes of side 2 cm each. How many cubes are formed?

What is the area of a triangle whose sides are 13 cm, 14 cm and 15 cm?

Water flows at 5 km/h through a pipe with an internal diameter of 14 cm into a rectangular tank that is 50 m long and 44 m wide. In how many hours will the water level in the tank rise by 7 cm? (Take pi = 22/7)

The radius of a cylinder is increased by 20% and its height is decreased by 20%. By what percentage does its volume increase?

What is the curved surface area of a right circular cone of base radius 7 cm and height 24 cm? (Take π = 22/7)