Math Is Fun Forum

AlbertMThomas

Member

Registered: 2013-08-21

Posts: 9

Rate of change problem

The volume of an empty container is 15 m³. If water is poured into the container at a rate of 2t + 2 m³ per minute where t is the time. What is the time needed to fill the container?

PLEASE PROVIDE STEPS!!

Bob

Administrator

Registered: 2010-06-20

Posts: 10,643

Re: Rate of change problem

hi AlbertMThomas

If water is poured into the container at a rate of 2t + 2 m³ per minute where t is the time.

Think about what that rate represents:

It's in cubic metres per minute so that's

At the start t = 0 and V = 0.  At the end V = 15 at (say) t = T

So integrate to get V in terms of t; put V = 15 (the constant of integration will come from t = V = 0) and solve for T

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

AlbertMThomas

Member

Registered: 2013-08-21

Posts: 9

Re: Rate of change problem

Thanks!!