Question

the ratio between mental perimeter of a rectangle is 2 is to 5 then the ratio between the length and breadth of the rectangle​

Answer 1

Step-by-step explanation:

Let length =5x and breadth=2x

Area of rectangle=5x×2x=10x

2

Perimeter of rectangle=2(l+b)=2×(5x+2x)=14x

Now,

A

P

=

3

1

⇒

10x

2

14x

=

3

1

⇒x=4.2

∴Length of rectangle=5×4.2=21 units.

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Answer 2

Answer:

Let length =5x and breadth=2x

Area of rectangle=5x×2x=10x  

2

 

Perimeter of rectangle=2(l+b)=2×(5x+2x)=14x

Now,  

A

P

​  

=  

3

1

​  

⇒  

10x  

2

 

14x

​  

=  

3

1

​  

⇒x=4.2

∴Length of rectangle=5×4.2=21 units.