the perimeter of the rectangle is 30 cm if the length of the rectangle is 9 cm then its breadth will be
Answers
perimeter = 30cm
length = 9cm
breadth = b
using the formula of finding perimeter
perimeter of rectangle = 2( l+ b)
30= 2(9+b)
9+ b = 30/2= 15
b = 15 - 9 = 6
so the breadth of rectangle = 6cm
Given :
- Length of rectangle = 9 cm
- Perimeter of rectangle = 30 cm
To find :
- Breadth of rectangle
According to the question,
★ Perimeter of rectangle = 2(Length + Breadth)
- l stands for Length
- b stands for Breadth
Let the breadth of rectangle be x
→ 30 cm = 2(9 cm + x)
→ 30 cm ÷ 2 = 9 cm + x
→ 15 cm = 9 cm + x
→ 15 cm - 9 cm = x
→ 6 cm = x
.°. x = 6 cm
So,the breadth is 6 cm...
_________
★ Verification :
→ Perimeter of rectangle = 2(Length + Breadth)
→ 30 cm = 2(9 cm + 6 cm)
→ 30 cm = 2(15 cm)
→ 30 cm = 30 cm
.°. L.H.S = R.H.S
Hence,verified !