Question

If perimeter of a rectangle is 100m and the length of rectangle is 30m, find the breath​

Answer 1

l=30

2(l+b)=100

l+b=50

30+b=50

b=20

Answer 2

$\color{aqua}answer : -$

☆ 20 cm

$\color{violet}explanation : -$

☆To find:-

• The breadth of rectangle.

☆Given:-

• The perimeter of the rectangle is 100 m
• Length of the rectangle = 30 m

☆Formula:-

• Perimeter = 2(length +breadth)=2(l+b)

☆Assuming:-

• Let the breadth of the rectangle be x

☆Solution:-

ATQ

$2(30 + x) = 100 \\ = > 60 + 2x = 100 \\ = > 2x = 100 - 60 \\ = > x = \frac{40}{2} = 20$

☆ Hence:-

• The breadth of the rectangle is 20 cm

hope it helps.... :)