Question

the long side of a rectangle is 25 cm and its perimeter is 80cm find the length of the shorter side determine its area

Answer 1

Given :

• The long side of a rectangle = 25 cm.
• Perimeter of a rectangle = 80 cm.

To find :

• The length of the shorter side determine its area =?

Formula Used :

• Perimeter of the rectangle = 2(length + breadth)
• Area of Rectangle = length x breadth

Step-by-step explanation :

It is Given that,

The long side of a rectangle = 25 cm.

Perimeter of a rectangle = 80 cm.

As We know that,

Perimeter of the rectangle = 2(length + breadth)

Substituting the values in the above formula, we get,

80 = 2(25 + breadth)

80 = 50 + 2 breadth

2breadth = 80 - 50

2breadth = 30

breadth = 30/2

breadth = 15.

Therefore, the length of the shorter side (breadth) = 15 cm.

Now, As we know that,

Area of Rectangle = length x breadth

Substituting the values in the above formula, we get,

= 25 × 15

= 375.

Therefore, Area of the rectangle = 375 cm².

Answer 2

Answer:

here,

length= 25 cm

perimeter= 80 cm

now

perimeter = 2(l+b)

80 cm= 2(25+b)

80cm= 50cm +2b

80cm-50cm= 2b

30cm =2b

b=30/2

b= 15  cm

therefore shorter side is 15 cm

again

area= length *breadth

       =  25 *15

        = 375 cm^2

Step-by-step explanation: