Question

a cardboard a big circel is cut out from IT who is area 154cm find original area of cardboard

Answer 1

if cardboard is square shape.
then side of square= diameter of big circle
hence, area of big circle=154cm^2
so, radius of circle =√154×7/22
=√49
=7cm
so, side of square= 2×7
=14cm

therefore, original area of cardboard=area of square
=14×14
=196 cm^2 answer.

Answer 2

a/q
area of circle =154cm2
πr2=154
r2=154^7/22
r=7
diameter of a circle is equal to side of cardboard so one side of cardboard is equal to 14 cm
now area of cardboard =side2=14^14=196
required answer is 196 CM2