CAT 2017 Trigonometry — Previous Year Question

A fish observes a submarine from the bottom of ocean, when the submarine starts moving up vertically. The angle of elevation of the submarine changes from 25 degrees to 60 degrees in 2 minutes. The point of observation of the fish is situated 300 metres (displacement) away from the takeoff point. If the submarine is going up in straight line at a constant speed, what is the speed of the submarine? (Here, tan 25° = 0.466)