Question

If side of a rectangle is (2x + 5y) and (3x + 2y) then perimeter of rectangle is:​

Answer 1

Answer:

AD=BC

AB=DC

3x+2y−11=x+y+4

5x+2y+2=2x+5y−7

2x+y=15..........................eq(1) multiplied by 3

3x−3y=−9..............................eq(2)

on adding both equationswe get

6x+3y=45

3x−3y=−9

_____________________

9x=36

x=4

puting x=4 in eq(1)

2×4+y=15

y=7

AB=5x+2y+2

=5×4+2×7+2=20+14+2=36

BC=x+y+4

=4+7+4=15

So, perimetre =2(36+15)

                       =102

Area==36×15=540

Diagonal==  

15  

2

+36  

2

 

​  

=  

1521

​  

=39

so a b c points are correct.

Step-by-step explanation:

Answer 2

$perimeter = l + b \\ = 2x + 5y + 3x + 2y \\ = 5x + 7y$