Pinky can swim 27 km downstream or 15 km upstream in 3 hours. What is the velocity of the current?

3 km/h 5 km/h 4 km/h 2 km/h

2 km/h

Let, x = speed of the object y = velocity of the current Downstream = x + y Upstream = x - y So, Downstream speed = \(\frac{27}{3}\)= 9 km/h Upstream speed = \(\frac{15}{3}\) = 5 km/h So, x + y = 9 x - y = 5 So,  2y = 4 y = 2 km/h