Just wanted someone to check my answers for this:

Two buildings of equal height are 300 meters apart. An observer on the street between the buildings measures the angles of elevation to the tops of the buildings as α = 30 degrees and β = 45 degrees, respectively.

a) Draw a labeled diagram depicting the above information.

b) How high are the buildings

b I got sin 30/300 = sin 45/b = 1/2/300 = sqrt(2)/2 which is 1/300sqrt(2)? anyone confirm?