Question

A rectangle has an area 165 sq.cm if its breadth is 11 cm, find its perimeter
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Answer 1

Answer:

15cm

Step-by-step explanation:

Let, x be the length

Now,

Area of a rectangle = l*b

165 = x * 11

165 = 11x

165/11 = x

15 = x

Length = 15cm

Answer 2

Step-by-step explanation:

Given :-

A rectangle has an area 165 sq.cm if its breadth is 11 cm.

To find:-

Find its perimeter?

Solution:-

Given that

Breadth of the rectangle = 11 cm

b = 11 cm

Let the length of the rectangle be X cm

We know that

Area of a rectangle = lb sq.units

=> X×11 sq.cm

Area = 11X sq.cm

According to the given problem

Area of the given rectangle = 165 sq.cm

=> 11X = 165

=>X = 165/11

=> X = 15 cm

Length of the rectangle = 15 cm

We know that

Perimeter of a rectangle = 2(l+b) units

On Substituting these values in the above formula

=> 2(15+11) cm

=> 2(26) cm

=> 52 cm

Perimeter = 52 cm

Answer:-

Perimeter of the given rectangle is 52 cm

Used formulae:-

• Area of a rectangle = lb sq.units

• Perimeter of a rectangle = 2(l+b) units

• l = length of the rectangle

• b = breadth of the rectangle