The angle of elevation of an areoplane frome ground is 60 after flight take of 30 sec later the angle pf ealivation is 30 find the speed of the plane
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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
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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