Question

the legth of a rectangular plot is 6 m less than thrice its breadth. find the dimensions of the plot if its perimeter is 148 m.

Answer 1

2 (3x-6+x)=148
3x-6+x=148÷2
3x-6+x=74
3x+x=74-6
3x+x=68
3x=68
x=68÷3
x=22.66

Answer 2

let l be the length and b be the breath of the plot
a.t.q. l+6=b-------1

peri=2(l+b)---------2
substituting 1 in 2 we get

peri = 2(l+l+6)
148/2 = 2l + 6
74 - 6= 2l
68=2l
l=34

b=l+6
=40


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