Question

Find the breadth of a rectangular plot of length 45m having perimeter 140 m. Also, find its area​

Answer 1

Answer:

Perimeter =140m

Length=45m

Perimeter = 2(l+b)

140 =2(45+b)

140 =90 + 2b

140-90 =2b

50= 2b

50÷2=b

25m=b

Area= l×b

=45×25

=1125m

Answer 2

Answer:-

b = 25 m

A = 1125 m²

Given :-

L = 45 m

p = 140 m

To find :-

It's area and length.

Solution:-

Perimeter of rectangle is given by :-

$\huge \boxed{ p =2 (l+b) }$

Now,put the value

→$140 = 2 ( 45 + b)$

→$140 = 90 + 2b$

→$140 -90 = 2b$

→$50 = 2b$

→$b = \dfrac{50}{2}$

→$b = 25 m$

We have,

l = 45 m

b = 25 m

Then, Area of rectangle is given by :-

$\huge \boxed{A =l \times b}$

→$A = 45 \times 25$

→$A = 1125 m^2$

hence,

Area of rectangle will be 1125 m².