Question

the question is in the picture .. plz help me​

Answer 1

Answer:

1536 cm ^2

Step-by-step explanation:

Let the length of the rectangle be 3x cm.

Then width of the triangle =2/3*3x cm=2x cm

Perimeter of rectangle=length+breadth

=3x+2x=5x

But, Perimeter =80 cm (given)

So, 5x=80 cm

i e. x=16 cm

Length=3*16 cm=48 cm

Width=2*16 cm=32 cm

Area of rectangle=length *breadth

=48 cm*32 cm

=1536 cm^2

Hence the area of the rectangle is 1536 cm^2.

HOPE IT HELPS FRIEND.

Answer 2

Answer:

384cm²

Step-by-step explanation:

Let's take the lenght of the rectangle as x and width as $\frac{2x}{3}$.

BTP:

2(x+$\frac{2x}{3}$)=80

2x + $\frac{4x}{3}$=80

$\frac{6x+4x}{3}$

$\frac{10x}{3} = 80\\x=80*\frac{3}{10} \\x=24cm=Lenght of the rectangle\\Width=\frac{2x}{3} =\frac{2*24}{3} =16cm\\Area of the rectangle=lenght *breadth=24*16=384$

So the area of the rectangle is 384cm²