Question

The perimeter of a rectangle is 20metres and one of its side is 4m. How many
meter is the other side?

Answer 1

Question:-

The perimeter of a rectangle is 20metres and one of its side is 4m. How many meter is the other side?

Answer:-

• The other side of rectangle is 6 m

To find:-

• Other side of rectangle

Solution:-

• Perimeter of rectangle = 20 m
• One side (breadth of rectangle) = 4 m

As we know,

$\huge{ \boxed{ \red{ \mathfrak{perimeter = 2(l + b)}}}}$

Where,

• l = length of rectangle
• b = breadth of rectangle

According to question,

$\Large{ \sf : \implies \: \: \: \: \: \: \: 2(4 + l) = 20}$

$\Large{ \sf : \implies \: \: \: \: \: \: \: 4 + l = \frac{20}{2} }$

$\Large{ \sf : \implies \: \: \: \: \: \: \: 4 + l = 10}$

$\Large{ \sf : \implies \: \: \: \: \: \: \: l = 10 - 4}$

$\Large{ \sf : \implies \: \: \: \: \: \: \: l = 6}$

Hence,

• The other side of rectangle is 6 m

Answer 2

Answer:

6m

Step-by-step explanation:

A Rectangle has equally two Lengths (l) and two breadths (b). Perimeter is sum of all four sides (2l + 2b).

(2l+2b)= 20

Take the given value 4 as breadth.

2 (l+b)= 20

2 (l+4)= 20

(l+4)= 10

l= 6m (ans.)

--> (6+6+4+4)= 20