In an isosceles triangle, if the unequal angle is twice the sum of the equal angles, then each equal angle is

Directions : A bar graph showing the heights of six mountain peaks is given below. Study the bar graph and answer the questions. 

What is the respective ratio of the heights of the highest peak and the lowest peak? 

If x% of $${25\over 2}\%$$ is 150, then the value of x is : 

if a=26 and b=22, then the value of   $${{a^3-b^3}\over {a^2-b^2}}-{3ab\over a+b}$$ is

A certain sum (in Rs.) is invested at simple interest at x% p.a. for 5 years. Had it been invested at (x+5)% p.a, the simple interest would have been Rs.9,200 more than the earlier one. What is the sum?

A wire is in the shape of a rectangle. Its length is 42.7m and breadth is 21.8m. If the same wire is re-bent in the shape of a square, what will be the measure of the side of the square?

3240, 540, 108, 27, ? , 4.5

A man gets a discount of 30% and then 20% on his food bill of Rs.1500. What is the total discount he got in rupees?