Two shots are fired simultaneously from the top and bottom of a vertical cliff with the elevation α = = 30°, ẞ = 60°, respectively as in Fig. The shots strike an object simultaneously at the same point. If a = 30√3 m is the horizontal distance of the object from the cliff, then the height h of the cliff is A- 30 m B- 45 m C- 60 m D- 90 m 30 60 a = 30√√3 m