The speed of the ship relative to the coast down the river is 30 km / h, and upstream is 26 km / h.

The speed of the ship relative to the coast down the river is 30 km / h, and upstream is 26 km / h. the speed of the ship relative to the river is?

To find the required speed of the considered motor ship relative to the river, we apply the formula: Vt = (V1 + V2) / 2.

Variables: V1 – downstream speed (V1 = 30 km / h); V2 – speed up the river (V2 = 26 km / h).

Calculation: VT = (V1 + V2) / 2 = (30 + 26) / 2 = 28 km / h.

Answer: Regarding the river, the motor ship in question must move at a speed of 28 km / h.