The boat’s own speed is 20.4 km / h, and the river’s speed is 2.5 km / h. The boat went along the river for 1.5 hours

| April 29, 2021 | education

The boat’s own speed is 20.4 km / h, and the river’s speed is 2.5 km / h. The boat went along the river for 1.5 hours, and against the current – 1.8 hours. How many kilometers the boat traveled.

1) 20.4 + 2.5 = 22.9 kilometers per hour – the speed of the boat along the river;
2) 20.4 – 2.5 = 17.9 kilometers per hour – the speed of the boat against the stream of the river;
3) 22.9 * 1.5 = 34.35 kilometers – the distance that the boat sailed along the river at a speed of 22.9 kilometers per hour in 1.5 hours of movement;
4) 17.9 * 1.8 = 32.22 kilometers – the distance that the boat sailed against the river at a speed of 17.9 kilometers per hour in 1.8 hours of movement;
5) 32.22 + 34.35 = 66.57 kilometers – the entire route of the boat.
Answer: 66.57 kilometers.



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