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| 1. |
An aircraft is flying along a horizontal line PQ directly towards the observer A on the ground and maintaining an altitude of 4500 m, the angles of depression of A from P and Q are 30 degree and 60 degree respectively. Find PQ. |
| Answer» An aircraft is flying along a horizontal line PQ directly towards the observer A on the ground and maintaining an altitude of 4500 m, the angles of depression of A from P and Q are 30 degree and 60 degree respectively. Find PQ. | |