K. R. S. Sastry, Two Brahmagupta problems,
Forum Geometricorum, 6 (2006) 301--310.

Abstract: D. E. Smith reproduces two problems from Brahmagupta's work Kutakhadyaka (algebra) in his History of Mathematics, Volume 1. One of them involves a broken tree and the other a mountain journey. Normally such objects are represented by vertical line segments. However, it is every day experience that such  objects need not be vertical. In this paper, we generalize these situations to include slanted positions and provide integer  solutions to these problems.

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