The length of a rectangle is 4cm less than thrice its breadth. If the perimeter of the rectangle is 80m, find the length and breadth of the rectangle?
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Let the length of rectangle =3x+4
Then ,the breadth of rectangle =x
Perimeter of rectangle =80m or 80×100 =8000cm
2 (l+b)=8000
l+b=8000÷2
l+b=4000
x+3x+4=4000
4x=4000-4
4x=3996
x=3996÷4
x=999
Then ,the breadth of rectangle =x
Perimeter of rectangle =80m or 80×100 =8000cm
2 (l+b)=8000
l+b=8000÷2
l+b=4000
x+3x+4=4000
4x=4000-4
4x=3996
x=3996÷4
x=999
anjalirathore:
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