Question

please 9th one please solve somebody asap

Answer 1

Let its length be x
LET its breadth be 3x

2(x+3x)=56
x+3x=28
4x=28
x=28/4
x=7

Length = 7
Breadth = 3x=7×3=21.



HOPE IT HELPS

Answer 2

Given that : The length of the rectangular playground is thrice its breadth.

Let, the breadth = x meter

then, Length will be 3x meter

Also given that : The perimeter of playground = 56 metres.

As we know that : Perimeter of rectangle :


$2(l + b)$

Now, according to the question :

$2(3x + x) = 56 \\ \\ = > 2 \times 4x = 56 \\ \\ = > 8x = 56 \\ \\ = > x = 7$

So, the Breadth will be 7 meter

$length \: = 3x = 3 \times 7 = 21$

And Length will be 21 meter