# Find the perimeter of the following rectangles: a) Length = 5cm, Breadth = 3cm b) Length and Breadth are in the ratio 4:3 and area is 1200 sq. meters.

2
by chibugi

2015-10-18T23:25:37+05:30

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A)

P = 2(l+b)

P = 2(8)

P = 16 cm

b) let length be 4x & breadth be 3x

ATQ.

A = 12x²

1200 = 12x²

x = 10 m

so , l = 40m

b = 30 m

so , P = 2× 70 = 140m
2015-10-18T23:50:52+05:30

### This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
A). Perimeter of a rectangle-= 2(l+b).
=2(5+3)
=16 cm.
b). Perimeter of a rectangle=2(l+b)
Area =1200
l*b=1200
But, l/b=4/3.
4x*3x=1200.
Therefore, l=40 m.
b=30 m.

Perimeter=2(40+30)
=2(70)
=140 m.