CBSE Class 10 Answered
Please sir solve this
Asked by harshitgamer6386 | 14 Jan, 2023, 08:22: AM
Expert Answer
When helicopter is at 1000 feet and angle of depression increases , then swimmer is approaching island.
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Helicopter and swimmer will be at same distance from island , if the
angle of depression is 45o
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If the helicopter ascends vertically upwards , then angle of depression increases.
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Distance d between swimmer and island is calculated when helicopter is at a height 1000 ft. from island.
( 1000/ d ) = tan60 = √3
d = 1000/√3 = 577 ft.
Answered by Thiyagarajan K | 14 Jan, 2023, 11:41: AM
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