A man is watching from the top of a t...

A man is watching from the top of a tower a boat speeding away from the tower. The boat makes an angle of depression of `45o` with the mans eye when at a distance of 60 metres from the tower. After 5 seconds, the angle of depression becomes `30o` . What is the approximate speed of the boat, assuming that it is running in still water? (a) 32 kmph (b) 36 kmph (c) 38 kmph (d) 40 kmph (d) 42 kmph

32kmph

36 kmph

38 kmph

40 kmph

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MCGROW HILL PUBLICATION-HEIGHTS AND DISTANCES -MULTIPLE CHOICE QUESTIONS

A man standing at a point P is watching the top of a tower, whic...
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The angle of elevation of the top of a tower from a certain point i...
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