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Byju's Answer
Standard X
Mathematics
Areas of Different Plane Figures
the perimeter...
Question
the perimeter of a rectangular field is 3/5 km. if the length of the field is twice its width find the area of the rectangle in m sq
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Solution
Let
the
width
of
the
rectangular
field
=
x
metre
then
the
length
of
the
rectangular
field
=
2
x
metre
Now
,
perimeter
of
the
field
=
3
5
km
=
3
5
×
1000
m
=
600
m
⇒
2
length
+
breadth
=
600
⇒
length
+
breadth
=
300
⇒
2
x
+
x
=
300
⇒
3
x
=
300
⇒
x
=
100
Now
,
width
of
the
field
=
100
m
length
of
the
field
=
2
×
100
=
200
m
Now
,
area
=
length
×
breadth
=
200
×
100
=
20000
m
2
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