If a man's rate with the current is 12 km/hr and the rate

If a man's rate with the current is 12 km/hr and the rate of the current is 1.5 km/hr then man's rate against the current is ?

Let the rate against the current be x km/hr.
Then, (12 - x) / 2 = 1.5
⇒ 12 - x = 3
⇒ x = 9 km/hr