An IV Infusion of 400 Ml of a Solution Is $2$

An IV infusion of 400 ml of a solution is set to infuse at a rate of 150 ml/h. How many hours will it take for this infusion to be completed?

A) $2$ h
B) $2 \frac { 1 } { 50 }$ h
C) $2 \frac { 2 } { 3 }$ h
D) $2 \frac { 2 } { 75 }$ h
E) $2 \frac { 1 } { 30 }$ h