For the following questions answer them individually
A train traveling of 55 km/hr travels X to place Y speed is increased km/hr., then the time of journey is reduced by
If a, b, c are positive and a+ b + c= 1, then the least value $$\frac{1}{a}+\frac{1}{b}+\frac{1}{c}$$ is
ABC is an equilateral triangle and CD is the internal bisector of L C. If DC is produced to E such that AC = CE, then ∠CAE is equal to