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1. |
Q: A pilot in an aeroplane at an altitude of 200 m observes two points lying on either side of a river. If the angles of depression of the two points be 45 ° and 60 °, then the width of the river is |
A. | 400√3m |
B. | $${400\over√3}m $$ |
C. | $$200+{200\over√3}m $$ |
D. | $$200-{200\over√3}m $$ |
Answer» D. $$200-{200\over√3}m $$ | |