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A cubical room is formed with six plane mirrors. An insect moves along the diagonal of the floor with uniform speed. the velocities of its images in two adjacent walls are 20x2 1/2 cm/s. then the velocity of the image formed by the roof?


A cubical room is formed with six plane mirrors. An insect moves along the diagonal of the floor with uniform speed. the velocities of its images in two adjacent walls are 20x21/2 cm/s. then the velocity of the image formed by the roof?

 


Grade:10

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