The boat, moving along the river, passed 27.18 in 1.8. Find your own boat speed if the current speed is 6.3 km / h.


Time (t) – 1.8 h,

Distance (S) – 27.18 km.

Current speed (Vt) – 6.3 km, h.

Find: boat speed (Vк).

It is known that the boat, moving along the river, covered 27.18 kilometers in 1.8 hours. Let’s calculate the speed of the boat along the river (Vkt) by the formula:

S = V * t,

V = S: t.

Vct = 27.18: 1.8 = 15.1 (km / h).

Knowing the speed of the boat downstream and the speed of the river flow, we find the speed of the boat:

Vk = Vkt – Vt = 15.1 – 6.3 = 8.8 (km / h).

Answer: the boat’s own speed is 8.8 km / h.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.