1.

The upper 3//4^(th) portion of a vertical pole subtends an angle "Tan"^(-1)(3//5) at a point in the horizontal plane through its foot and at a distance 40 m from the foot . Given that the vertical pole is at a height less than 100m from the gound ,find its height .

Answer»

20m
40m
60m
80m

Answer :B


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