Heights and distance question no 16

Dear student, 
Your question is incomplete. I am considering question as - An aeroplane when flying at a height of 3125m from the ground passes vertically below another plane at an instant when the angles of elevation of the two planes from  the same point on the ground are 30 degree and 60 degree respectively, Find the distances between the two planes at the instant..

​​​​​​​Regards. 

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