Question

The answer of this question.

Answer 1

here is your answer

Answer 2

let the breadth be x cm,then it's length will be 3x cm.
area of a rectangle =l×b
1875=x×3x
$1875 = 3 {x}^{2}$
$\frac{1875}{3} = {x}^{2} \\ 625 = {x}^{2} \\ x = \sqrt{625} \\ x = 25cm$
breadth=x=25, length=3x=75
perimeter=2(l+b)
=2(25+75)
=2×100
=200cm.
I hope it helps you