A balloon leaves from a point P rises at a uniform speed. After 6 minutes, an observer situated at a distance of 450√3 metres from point P observes that angle of elevation of the balloon is 60o. Assume that point of observation and point P are on the same level. What is the speed (in m/s) of the balloon?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2. i.e. 3.75
h = 450 × 3 = 1350 m
Speed of Baloon = 
= 3.75 metre/second