Well, we have the following information:

Well, looks like we need to find

Let's take a look at it, if we implicitly differentiate the first equation, we are left with a are we not?

Looks like it's something we can work with, now we plug it back in to the equation given for

Now we plug in the values:

Notice that it's positive, as the question states, it is increasing.

Just to see how the units work here's the equation without the numbers: