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.
| July 26, 2021 | education
Given:
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.
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