Question

a well of diameter 140 CM has a stone parapet around it if the length of the outer edge of the parapet is 616 cm find the sides of the parapet

Answer 1

let the radius of the circle formed by the parapet be r
$circumfrence{c} = 2 \pi r$
C=2πr
616=2 × 22/7 ×r
616 × 7/2 × 22=r
99.59=r
therefore d= 2r = 199.18
let the width (side) of the parapet be z
2z +140=199.18
2z=59.18
z=29.59