Brian wants to build a ramp that leads to a storeroom 5 meters above the ground. he wants the ramp to be 10 meters long. what should the angle of elevation of the ramp be?

The ladder that extends from the floor to the storeroom makes a right triangle.  The ramp is the hypotenuse measuring 10 m and the elevation of the storeroom is the opposite side. The angle of elevation is the arcsin of the quotient of the 5/10. Thus, the answer is 30 degrees.