Question

The length of rectangle is 15cm then its breadth. Its perimeter is 150cm. Find the dimensions of the rectangle.

Answer 1

Answer:

Length is 45 cm.

Breath is 30 cm.

Step-by-step explanation:

Let the breath(B) be x.

Then length(L) will be x+15.

Perimeter is 150 cm.

ATQ,

Perimeter = 2(L+B)

150 = 2(x+15+x)

150 = 2(2x+15)

150 = 4x+30

(150-30) = 4x

120/4 = x

30 = x

THEREFORE,

BREATH = x = 30

LENGRH = x+15 = 30+15 = 45

Answer 2

Length of rectangle is equal to 15 + b  

Breadth of rectangle is equal to b  

Perimeter is equal to 150

Equation

Perimeter is equal to 2 l + b  

2 l + b is equal to p

 2 into l + 15 + b is equal to 150  

2b+ 30 + 2B is equal to 150

4B is equal to 150 - 30

4B is equal to 120  

b is equal to 120 divided by 4

b is equal to 30

Therefore;

breadth is equal to b is equal to 30

length is equal to b + 15 is equal to 30 + 15 is equal to 45