Question

if length of a rectangle is 3 times its breadth and area is 1875sq.cm find its perimeter

Answer 1

Let the length be 3x
And breadth be x

Given,
Area of rect.=1875sq.cm

Area of rect.=l×b
=3x × x
=3x^2
Now,
3x^2 =1875
X^2 =1875/3
X^2=625
X=✓625
X=25

Length=3×25=75 cm
Breadth=25 cm

Perimeter=l+b
= 75+25
=100 cm