Question

the perimeter of rectangle is 70 cm .If its breadth is 5cm less than its length find the area of the rectancle ( breadth = L-5 )

Answer 1

hey..

perimeter of rectangle = 2(l+b)
70 = 2(l+l-5)
70/2 = 2l-5
35+5 = 2l
l = 40/2
l = 20

b = 20-5
= 15

Area of rectangle = l x b
= 20 x 15
= 300cm^2

Answer 2

$\huge\boxed{\texttt{\fcolorbox{Red}{aqua}{Hey Mate!!}}}$
$<b><i><font face=Copper black size=4 color=blue>$
Here is your answer.

Let the Length is x cm
Breadth = x - 5 cm

As we know the formula
Perimeter of the rectangle = 2(length + Breadth)
$70 = 2(x + x - 5) \\ \\ \frac{70}{2} = 2x - 5 \\ \\ 35 + 5 = 2x \\ \\ 2x = 40 \\ \\ x = \frac{40}{2} \\ \\ x = 20$
Length = 20 cm

Breadth = 20 - 5 = 15 cm

Now
Area of rectangle = Length × Breadth

= 20 × 15

$= 300 {cm}^{2}$

Therefore, Area is 300 ${cm}^{2}$


$\large{\red{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\underline{\underline{\underline{Hope \: it \: helps\: you}}}}}}}}}}}}}}}$

$\huge\boxed{\texttt{\fcolorbox{Red}{yellow}{Be brainly!!}}}$

$<marquee>$
$\huge\bf{\huge{\bf{\bf{@...rajeev378}}}}$