Boat in the lake
A boatman walks along the ship's deck at a constant speed of 5 km/h in a direction that forms an angle of 60° with the direction of the ship's speed. The boat moves with respect to the lake's calm surface at a constant speed of 10 km/h. Determine graphically the magnitude of the speed with which the boatman moves relative to the shores of the lake.
Correct answer:
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Do you want to convert velocity (speed) units?
See also our right triangle calculator.
Do you want to convert time units like minutes to seconds?
Cosine rule uses trigonometric SAS triangle calculator.
See also our trigonometric triangle calculator.
You need to know the following knowledge to solve this word math problem:
- geometry
- vector
- arithmetic
- addition
- planimetrics
- Pythagorean theorem
- right triangle
- triangle
- The Law of Cosines
Units of physical quantities:
Themes, topics:
Grade of the word problem:
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