Figure please....

JEE Advanced Forum › Trignometry questions › Figure please....

A lighthouse, facing north, sends out a fan-shaped beam of light extending fron north-east to north-west. An observer on a steamer, sailing due west, first sees the light when he is 5 km awayfrom the lighthouse, and continues to see it for 30 x sqrt.2 minutes. What is the speed of the steamer...? Can anyone draw a figure for this ?

#Mathematics #Trignometry

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4 Answers

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Sambit Senapati ·2011-08-14 05:06:09

experts please help.

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Sambit Senapati ·2011-08-17 03:06:33

No one?

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262

Aditya Bhutra ·2011-08-17 07:45:43

time= 30âˆš2 min.
d= 5âˆš2
v= d/t = 1/6 km/min.

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Sambit Senapati ·2011-08-18 02:12:55

Thanks. I took the light to be rotating from NE to NW. And I also took the boat to already be travelling in west direction.

So, this one's not that difficult I see. Just the figure matters

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Your Answer

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√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

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° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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11

Asked by

Sambit Senapati

2011-08-12 02:00:49

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