For the following questions answer them individually
The angle of elevation of the top of a tower froma point P on the groundis $$45^\circ$$ and moving s feet towards the tower the angle of elevation is found to be $$60^\circ$$. The height (in feet) of the tower is
The highest common factor of the polynomials $$p(x) = x^4 - 2ax^3 - 3a^2x^2$$ and $$q(x) = x^5 - 2ax^4 - 8a^2x^3$$ is
If $$x^2 + x - 2$$ is a factor of $$x^4 + 3x^3 - 8x^2 + p(x)$$, where p(x) is a linear polynomial then p(x) =
In 10 years. A will be twice as old as B was 10 years ago. If A is 9 years older than B then the present age (in years) of B is
The number of solutions of the system of linear equations x + y + z = 3, 2x + 2y - z = 3 and x + y - z = 1 is
If $$a_1, a_2, a_3, ............, a_{19}$$ are 19 arithmetic means between $$\frac{1}{4}$$ and $$-\frac{39}{4}$$ then $$a_7 =$$
If the sum of the first six terms of a geometric progressionis 9 times the sumof the first three terms then the commonratio r > 1 is