The boat covered 200 kilometers in 4 hours. How long will it take to cover 550 kilometers?

The boat is moving at a steady speed. He walks the same distance for every hour he moves.

Let us denote the unknown time required to overcome 550 km by the letter X.

Let us compare in proportion 200 km, as covered in 4 hours, and 550 km, as covered in an unknown number of hours of movement.

Let’s make the proportion and find the time of movement of the boat X:

in 4 hours – passed 200 km;

in X hours – passed 550 km;

X = 4 hours * 550 km / 200 km = 11 hours.

Answer: The boat will cover 550 km in 11 hours.