1.

A tower, of x metres high, has a flagstaff at its top. The tower and the flagstaff subtend equal angles at a point distant y metres from the foot of the tower. Then the length of the flagstaff in metres in

Answer»

` ( y(X^(2) - y^(2)))/( x^(2) +y^(2))`
` ( x( y^(2) +x^(2)))/( y^(2)- x^(2))`
` (x( x^(2) +y^(2)))/( x^(2) - y ) `
` ( x(x^(2)-y^(2)))/( x^(2) + y^(2))`

ANSWER :B


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