the perimeter of rectangle is 13cm and it's width is three 2/4 cm find its length
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perimetre=13 cm
perimetre of a rectangle=2(l+b)
breadth=3 2/4
breadth=14/4
=7/2
∴13=2(l+7/2)
2l+2×7/2=13
2l+7=13
2l=13-7
2l=6
l=6/2
l=3
Answered by
1
given perimeter =13
perimeter of rectangle = 2(l+b)
width= breadth = 3 2/4
breadth =14/4= 7/2
substitute in formula
13= 2(l + 7/2
2l + 2×7/2 =13
2l +7=13
2l= 13-7
2l=6
l =6/2
l=3
length=3cm
perimeter of rectangle = 2(l+b)
width= breadth = 3 2/4
breadth =14/4= 7/2
substitute in formula
13= 2(l + 7/2
2l + 2×7/2 =13
2l +7=13
2l= 13-7
2l=6
l =6/2
l=3
length=3cm
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