For the following questions answer them individually
A guard observes an enemy boat, from an observation tower at a height of 180 metre above sea level, to be at an angle of depression of $$60^\circ$$. The distance of the boat from the foot of the observation tower is
If $$\cos x = \sin y$$ and $$\cot (x - 40^\circ) = \tan (50^\circ - y)$$, then the values of x and y are
Radius of the incircle of an equilateral $$\triangle ABC$$ of sides $$\sqrt{3}$$ units is
A and B can together do a piece of workin 6 days. If B can do the work by himself in 8 days, how many days will A take to do the work independently?