The speed of the boat downstream is 29.9 km / h, the speed of the current is one thirteenth

univerkov | March 25, 2021 | education

The speed of the boat downstream is 29.9 km / h, the speed of the current is one thirteenth of the speed of the boat downstream. What is the speed of the boat against the current?

1) Calculate 1/13 of the speed of the boat downstream, thereby finding out the speed of the river:

29.9: 13 * 1 = 2.3 km / h.

2) The speed of the boat downstream is the sum of its own speed and the speed of the river. Therefore, to find the boat’s own speed, it is necessary to subtract the speed of the river from its downstream speed:

29.9 – 2.3 = 27.6 km / h.

3) To find the speed of this boat against the current, you need to reduce the boat’s own speed by the speed of the river current:

27.6 – 2.3 = 25.3 km / h.

Answer: 25.3 km / h.

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