The boat’s own speed is 28 km / h and the current speed is 1.8 km / h. At first, the boat went 1.4 hours
| May 3, 2021 | education
The boat’s own speed is 28 km / h and the current speed is 1.8 km / h. At first, the boat went 1.4 hours against the current, and then 0.8 hours downstream, which way the boat traveled during all this time.
The boat’s own speed is 28 km / h, and the current speed is 1.8 km / h, which means that the boat will go downstream at a speed:
28 + 1.8 = 29.8 km / h,
and against the flow with speed:
28 – 1.8 = 26.2 km / h.
Therefore, in 1.4 hours against the current, the boat passed:
26.2 * 1.4 = 36.68 km.
In 0.8 hours, the boat passed downstream:
0.8 * 29.8 = 23.84 km.
Thus, the entire path of the boat was:
36.68 + 23.84 = 60.52 km.
Answer: 60.52 km.
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