Question 1028245
Hard to draw this for you, but if you draw the diagram, you can determine that the supplement to the 50 degree angle is 130 degrees.  That means the farther triangle is isosceles, having angles of 25-25-130 degrees.  That means that the hypotenuse of the inner triangle is also 15 m.  Now use the sine relationship to write
sin 50 = h/15
h = 15 sin 50 = 11.5 m tall