Question: An aircraft is flying at a height of 3400 m above the ground. If the angle subtended at a ground observation point by the aircraft position 10 s apart is 30°, then the speed of the aircraft is
(A) 19.63ms^{-1}
(B) 1963ms^{-1}
(C) 108ms^{-1}
(D) 196.3ms^{-1}
Answer: option (D)
Solution:
