Question

In the figure shown ABCD is a rectangular smooth tube kept fixed in a vertical
plane. A particle is projected from point A to reach point C with some speed.
At the corners B and D velocity changes its direction by 90º without any

change of its magnitude at that corner. If time taken on paths ABC and ADC
are t1
and t2
respectively, then: (given l > b)​

Answer 1

Answer:

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