Damn it man, Additional Mathematics was given its name for a very apparent reason. and that is its ability to add additional stress on any student round the globe. one just have to take a look at its apparent difficulty, who ever asks you, if water leaks out of a cylinder at 0.0025 cm/s, and thats a cone cup whose volume is represented by 3.142(X)(X) / 12, and asks you to find the rate of which water enters the cone cup.

given the cylinder has 10cm as its radius,

and that the cone has 4cm as its radius and 8cm as its height.

how the fuck do i do that?

dV/dT = dV/dX * dX/dT . wtf.. -.-"