Question

1 )A circular pond of diameter 28m
is surrounded by a path 7 meater.
Find the area of the path.
2 find the area of a 2- m- wide circular plot of radius 20 m​

Answer 1

1 )A circular pond of diameter 28m

is surrounded by a path 7 meater.

Find the area of the path.

2 find the area of a 2- m- wide circular plot of radius 20 m

Answer 2

Answer:

(i) Area of the path =π(R

2

−r

2

)

Here,

R=

2

28

+7=14+7=21 m

r=21−7=14 m

Area of the path =π(21

2

−14

2

)

=

7

22

×245

=770 m

2

(ii) Area of circular path =π(R

2

−r

2

)

Here,

R=20+2=22

r=22−2=20 m

Area of circular path =π(22

2

−20

2

)

=

7

22

×84

=264 m

2