Question

a road which is 7 M wide surrounds a circular Park whose circumference is 352m. Find the area of the road .

Answer 1

Given= breath of Road(b)=7m

   Circumferemce of Circular park=352m

sol= circumference=2πr1

            352m=2 x 22/7 x r1

r1=352m x 1/2 x7/22

r1=56m

Radius of circle including road(r2))= 56+7=63

Area of road= π(r12 – r22)

 = 22/7x(632 -562)

=2618 m2

hope it is right 

Answer 2

XCircumference of circular park = 352 m



∴ 2πr= 352
∴ Radius of circular park = 56 mArea of circular park = πr2Width of road = 7 m.∴ Area of circular park with road = π (radius + width)
Thus, area of road = Area of circular park with road – Area of circular park=
12474 m2– 9856 m2=
2618 m2