The boat, which speed is 18 km / h, sailed 2 hours after the current for 3 hours against the current. What distance during this time the boat covered, if the speed of the river flow is 2 km / h.
The required distance, which the boat will cover for the entire time, is expressed through the conditional variable “Y”.
Using the information from this example and taking into account the speed formula, we have this equation: Y = 2 x (18 + 2) + 3 x (18 – 2).
The outcome of solving this equation will be Y = 2 x 20 + 3 x 16 = 40 + 48 = 88 kilometers.
Answer: the boat will cover 88 kilometers.
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