Question

the length and breadth of a rectangle is 7x+y+5 and 4x+2y respectively. find the perimeter​

Answer 1

2x+y+8=4x-y.

or -2x+2y=-8.

or x-y = 4………………..(1).

x+4 = 2y.

x-2y = -4……………………(2).

Subtract eq (2) from (1) , y = 8 .

put y=8 in eq.(1) . x-8=4 => x=12 units

length (l) =2x+y+8=24+8+8=40 units.

bredth (b)=2×8= 16 units.

Perimeter = 2×(l+b)=2×(40+16) =112 units.

Area =l×b =40×16 =640 sq.units.

Answer 2

Step-by-step explanation:

Perimeter of Rectangle = 2 ( L + B )

Given that

L = 7x + y + 5

B = 4x + 2y

Thus Total perimeter of Rectangle =

• 2 ( 7x + y + 5 + 4x + 2y )
• 2 ( 11x + 3y + 5 )
• 22x + 6y + 10

Thus Total Perimeter of Rectangle is 22x + 6y + 10

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