Question

the length of a rectangle is 5cm more than its breath its area is 300sq cm find the length and breadth​

Answer 1

Answer:

Let the breadth be x cm

length=x+5 cm

perimeter =2 (l+b)=

2 (x+5+x)=4x+10 cm

4x+10=40

4x=30

x=30/4=7.5

so breadth=7.5 cm ; length=12.5 cm

area=l×b= 12.5×7.5=93.75  

Step-by-step explanation:

Answer 2

Answer:

Breadth = 15

Length = 20

Step-by-step explanation:

Let,

Breadth = x

length = x+

Area = L×B

 = x (x+5)

 = x² + 5x .......( 1 )

But,

A = 300sq.cm

Put in ( 1 )

 300 = x² + 5x

 x² + 5x - 300 = 0

 x² - 15x + 20x - 300 =

 x ( x - 15 ) + 20 ( x - 15 )

( x + 20 ) ( x - 15 ) =

BALANCE ANS. IS ON THE IMAGE BELOW