Posted by **HADEEL** on Monday, July 16, 2012 at 2:33am.

Molten plastic is injected into the centre of a circular mold of constant height, H, through a small hole. The rate of injection is such that the radius of the plastic inside the mould increases so that

r(t)= 3t^2 -2t^3 where the mold has maximum radius of one unit. Compute the rate of change of volume of plastic in the mold, V (t), given that V = H(pie)r^2. At what time is the mold filling fastest and what is the value of dV/dt at that time?

## Answer This Question

## Related Questions

- Physics - Consider a spherical plastic shell with inner radius r=1cm, r2=2cm, ...
- Physics - A small disc of mass 0.7 kg is attached to a string on a frictionless ...
- physics - (a) 2.0 kg of molten copper at its melting point of 1083 ÂșC (the ...
- Plastic Moulds ==> Couldn't find anything myself - I'm proposed a way I'd ...
- Science - The science teacher gave each group in the science lab a pair of wires...
- math - Inside a long empty cylinder with radius R = 25 cm is put a long solid ...
- Pre Calculus - At a glassware factory, molten cobalt glass is poured into molds...
- 11th grade - At a glassware factory, molten cobalt glass is poured into molds to...
- Calculus - Along reservoir has the shape of a right circular cone having a ...
- Chemistry - Several years ago a company invented plastic ice cubes. These were ...

More Related Questions