Question

a circular path is enclosed by two concentric circles.if the outer circumference of the path is 88cm and the uniform width of path is 3.5cm,find area of path

Answer 1

Circumference of outer circle =88
2πr=88
πr=44
r=44×7/22
r=14
3.5 cm of path is created inside it
so the radius of small circle =14-3.5=10.5
Area of path = Area of big circle - Area of small circle.
=πR^2-πr^2
=π(R^2-r^2)
=π(R+r)(R-r)
=22/7×(14+10.5)(14-10.5)
=22/7×24.5×3.5
=22×24.5×.5
=269.5cm^2

Answer 2

idk

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