The boat sailed along the river in 2.4 hours distance 55.2 km Speed of the river 2.5 km / h Speed of the boat?

univerkov | June 15, 2021 | education

Let the speed of the boat be x. Then the downstream speed is x + 2.5. The time that the boat moved and the way are known. Let’s make the equation:

2.4 * (x + 2.5) = 55.2;

2.4x + 6 = 55.2;

2.4x = 55.2 – 6;

2, x = 49.2;

X = 49.2: 2.4;

x = 20.5.

Answer: the speed of the boat is 20.5 km / h.

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