physics

A girl inside a room is looking at the window and sees a volleyball passing outside
the window of width w and height d. The ball appears from the upper left corner A of
the window and disappears at the lower right corner B in t0 second. The girl knows
that the ball has been kicked by a friend from a balcony at a height h above the upper
edge of the window. The ball was kicked t seconds before it appeared at A. Find t
under the hypothesis that viscosity is negligible.

DATA: h =5[m]; w=2[m];d=1.5[m]; t0 =1[s]

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asked by talal

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