The own speed of the boat is 16 km / h, the speed of the river is 3 km / h, how many kilometers will the boat sail in 4 hours if: 1) it floats downstream of the river: 2) it floats against the current?
1. Calculate the speed at which the boat is sailing in the direction of the water flow in the river:
16 + 3 = 19 km / h.
2. We calculate the speed of the boat against the flow of water in the river:
16 – 3 = 13 km / h.
3. We calculate the length of the boat’s path for 4 hours along the river:
19 x 4 = 76 kilometers.
4. We calculate how many kilometers the boat will sail in 4 hours against the flow of water in the river:
16 x 4 = 64 kilometers.
Answer: in the direction of the flow of water in the river, the boat will sail 76 kilometers in 4 hours, against the current it will swim 64 kilometers in 4 hours.
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