CBSE Class 11-science Answered
An aircraft is flying at a height of 3400m above the ground. If the angle subtended at a ground observation point by the aircraft positions 10 s apart in 30o , what is the speed of the aircraft?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
The aircraft takes 10s to go from A to B and AB subtends an angle 30o at O.
In right angled triangle OAC,
AC = OC tan 15o = 3400 x 0.2679 = 911 m
Therefore, AB = 2 x 911 = 1822 m
Now, the speed of aircraft
v = AB/t = 1822 / 10 = 182.2 m/s
Answered by | 04 Jun, 2014, 03:23: PM
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