Question

find the perimeter of regular rectangle whose length three times of breadth if area is 900 square centimetre ​

Answer 1

Explanation:

Area of rectangle=900cm^2

A.T.Q

Let breadth be x cm

So length=3x

3x*x=900

3x^2=900

x^2=300

x=√300

x=10√3cm

length=30√3cm

perimeter=2(l+b)

=2(10√3+30√3)

=2(40√3)

=80√3cm