Hi guys i am stuck on the following problem

275*(1/1,0)*((5,5-(h/30))/3)*((30*h^2)/6)=288*10^3

I am stuck on this problem

Some hints i got is that it should be 11

Whats the easiest way to solve it

Its supposed to be simplified to

5,5*h^2- (h^3/30)=628

Would be grateful if someone could explain and show me the steps to obtain h thoroughly

I am also unsure exactly how to continue from the simplified version

Thank you