Car intersection speed

Two cars started from the right-angled intersection of two roads. The first at a speed of 80 km/h and the second at a speed of 60 km/h. How fast are they moving away from each other?

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You need to know the following knowledge to solve this word math problem:

arithmetic

square root

planimetry

Pythagorean theorem
right triangle

Units of physical quantities

velocity

themes, topics

motion problems

Grade of the word problem

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