# 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

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) $196.3ms^{-1}$