Math, asked by sandeepriya112, 2 months ago

The length of a rectangular field is 20 m and its perimeter is 50m. Find its breadth.

Answers

Answered by amanraj56
0

Step-by-step explanation:

peri. if rectangle= 2(l+b)

50= 2(20+b)

25= 20+b

5= b

hence breadth of rectangle is 5m

#666

Answered by TwilightShine
10

Answer :-

  • The breadth of the rectangular field is 5 m.

Given :-

  • The length of the rectangular field is 20 m.
  • It's perimeter is 50 m.

To find :-

  • The breadth of the rectangular field.

Step-by-step explanation :-

The question has given us the perimeter and length. We have to find the breadth.

For this, we are gonna use the formula required for finding the perimeter of a rectangle.

Let's assume that the breadth is b.

We know that :-

Perimeter of a rectangle = Length × Breadth.

So, lets apply the formula.

We get :-

 \sf2 \: (20 \: m + b) = 50 \: m

Removing the brackets,

 \sf40 \: m + 2b = 50 \: m

Transposing 40 from LHS to RHS, changing it's sign,

 \sf2b = 50 \: m - 40 \: m

On subtracting the numbers,

 \sf2b = 10 \: m

Transposing 2 from LHS to RHS, changing it's sign,

 \sf b =  \dfrac{10 \: m}{2}

Dividing 10 m by 2,

 \sf b = 5 \: m.

Therefore, the breadth of the rectangular field is 5 m.

Verification :-

To check our answer, let's apply the formula of finding the perimeter of a rectangle (Since we now have the length and breadth, along with the perimeter) and see if we get the perimeter after multiplying the length and breadth by 2 and then adding them.

Lets proceed!

 \sf2 \: (20 \: m + 5 \: m)

Removing the brackets,

 \sf40 \: m + 10 \: m

On adding the numbers,

 \sf\Rightarrow50 \: m.

Since we got the perimeter,

Hence verified!

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