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let the breadth be x
let the length be 3x
3x+x = 84
x=84÷4
=21
b=21
l(3x)=21×3
=63
let the length be 3x
3x+x = 84
x=84÷4
=21
b=21
l(3x)=21×3
=63
Answered by
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let the length of rectangle be 3x
let the width of rectangle be x
and perimeter of rectangle is 84
so, formula of rectangle is 2(L+B)
84= 2(3x+x)
84=6x+2x
6x+2x=84
8x=84
x=84\8
x=20
let the width of rectangle be x
and perimeter of rectangle is 84
so, formula of rectangle is 2(L+B)
84= 2(3x+x)
84=6x+2x
6x+2x=84
8x=84
x=84\8
x=20
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