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Standard VII
Mathematics
Question
A road which is
7
m wide surrounds a circular park whose circumference is
352
m. Find the area of road.
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Solution
Verified by Toppr
Circumference of circular park
=
352
m
2
π
r
=
352
2
×
22
7
×
r
=
352
r
=
32
×
7
4
=
8
×
7
=
56
m
r
2
=
56
+
7
=
63
m
,
r
1
=
56
m
Area
=
π
r
2
2
−
π
r
2
1
=
π
(
63
2
−
56
2
)
=
2616.947
m
2
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