The angle of elevation of the top of an unfinished pillar at a point 150 m from its base is 30°. If the angle of elevation at the same point is to be 45°, then the pillar has to be raised to a height of how many metres?

• A. 59.4 m
• B. 61.4 m
• C. 62.4 m
• D. 63.4 m