The speed of the boat against the stream of the river is 19.2 km / h, the speed of the current is 1.8 km / h.
| March 27, 2021 | education
The speed of the boat against the stream of the river is 19.2 km / h, the speed of the current is 1.8 km / h. Find the entire path covered by the boat, if it goes 5 hours downstream and 3 hours upstream?
Find the doubled value of the river flow velocity.
1.8 * 2 = 3.6 km / h.
Determine the speed of the boat downstream.
Add the obtained value to the speed upstream.
Will be:
19.2 + 3.6 = 22.8 km / h.
Find the distance that the boat has traveled in each direction.
To do this, we multiply the corresponding speed by the time of movement.
22.8 * 5 = 114 km (the boat went downstream).
19.2 * 3 = 57.6 km (the boat passed against the stream).
In this case, the boat sailed in total:
114 + 57.6 = 171.6 km.
Answer: 171.6 km.
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