If the area of a circle and the square are equal then the ratio of their perimeter is

A square and an equilateral triangle are drawn on the same base. the ratio of their area is

The ratio of the area of a square to that of the square drawn on its diagonal is

The angles of triangle are in the ratio 3:4:5 the measure of the largest angle of the triangle is

The ratio of the outer and the inner perimeter of a circular path is 23 : 22, if the path is 5 meter wide the diameter of the inner circle is?

Two chords AB and CD of a circle with centre O intersect at P. If ∠APC = 40°. Then the value of ∠AOC + ∠BOD is

A, B and C started a business with their investments in the ratio 1 : 2 : 4 . After 6-month A invested the half amount more as before and B invested same the amount as before while C withdrew $$1\over 4$$th of the his investments. Find the ratio of their profits at the end of the year. 

If A : B = 1 : 2 , B : C = 3 : 4 , C : D = 6 : 9 and D : E = 12:16 then A : B : C : D : E is equals to -