Question

the perimeter of rectangle is 160cm. if the breadth of the rectangle is 30 cm, find its length.also find the area of the rectangle.

Answer 1

we know that perimeter of a rectangle is given by p=  2(l+b)
given p=160 cm
b=30cm
hence 2l+2*30=160
2l+60=160
2l=100
l=50cm
area of a rectangle is given by l*b
                                                       =50*30
                                                         =1500 sq.cm

Answer 2

Length of rectangle is 50 cm.

Area of rectangle is 1500 cm².

Given:

• The perimeter of rectangle is 160cm.
• If the breadth of the rectangle is 30 cm.

To find:

• Find its length.
• Also find the area of the rectangle.

Solution:

Formula to be used:

1. Perimeter of rectangle:2(l+b)
2. Area of rectangle: l×b; here, l: length and b: breadth of rectangle.

Step 1:

Find length of rectangle.

As,

Perimeter of rectangle: 160 cm

Breadth: 30 cm

So,

$2(l + 30) = 160$

or

$l + 30 = 80$

or

$l = 80 - 30$

or

$\bf \red{l = 50 \: cm}$

Thus,

Length of rectangle is 50 cm.

Step 2:

Find area of rectangle.

As,

Length= 50 cm

Breadth= 30 cm

So,

$Area= 50 \times 30$

or

Area= 1500 cm².

Thus,

Area of rectangle is 1500 cm².

Learn more:

1) the area of square field is 81 square meter then its perimeter is?

https://brainly.in/question/8205720

2) Find the area of a circular ring whose external and internal radii are 21cm amd 14 cm respectively.

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