[" 16.Theangle of elevation of the toopof averical ower standing on aborizally abortally abour the point A.If "],[" to be "45^(@)" fromapoint An the plane cet "B" be the prestically above the point "A" .If "],[" the angle of elevation of the top of the tower from "B" ,then the distance (in "m" ) of the "],[" foot of the tower from the point "A" is: "],[[" (A) "15(1+sqrt(3))," (B) "15(3-sqrt(3))," (C) "15(3+sqrt(3))," (D) "15-sqrt(3))]]