Question

The angle of ellivation is 30 degree and after 24 second the angle of ellivation is 60 find the velocity if the height is 3600root3

Answer 1

In triangle ACE,


CE = 10800 m

AC = BD =


In triangle BED,


CD + DE = CE

CD + 3600 = 10800

CD = 10800 - 3600 = 7200 m

Distance travelled = 7200 m

Time taken = 30 seconds


In 1 second = 240 m

In 3600 seconds (1 hour) = 240 × 3600 = 864000 m = 864 km

In hour = 864 km

Speed = 864 km/h



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