maths

1)An equilateral triangle S of side x cm.

(i)Find the perimeter
(ii)Find the height
of the triangle in terms of x

(iii)Hence,find the ratio of the perimeter of S to the height of S.

(iv)given a circle of the radius r cm, if its circumference equals the perimeter of triangle S, find the ratio of the height of S to the radius of circle.


2)If x:y=3:4 and 2x+5y=598,find x.