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Mathematics 9 Online
OpenStudy (anonymous):

Please help!!! A source of laser light sends rays ab and ac towards two opposite waslls of a hall. The light strikes the walls at points b and c. What is the distance between the walls? 80m 140m 70m 110m

OpenStudy (anonymous):

@peachpi

OpenStudy (danjs):

Light travels at a constant velocity, near 3 by 10^8 m/s. How much time did it take each ray to reach both walls?

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