Mathematics
A rectangular water-tank measuring 80 cm x 60 cm x 60 cm is filled from a pipe of cross-sectional area 1.5 cm2, the water emerging at 3.2 m/s. How long does it take to fill the tank?
Related Questions
A hose-pipe of cross-section area 2 cm2 delivers 1500 litres of water in 5 minutes. What is the speed of water in m/s through the pipe ?
The cross-section of a piece of metal 4 m in length is shown below. Calculate :

(i) the area of the cross-section;
(ii) the volume of the piece of metal in cubic centimetres.
If 1 cubic centimetre of the metal weighs 6.6 g, calculate the weight of the piece of metal to the nearest kg.
If the total surface area of a cube is 96 cm2, then the volume of cube is
8 cm3
512 cm3
64 cm3
27 cm3