Question

a rectingular board was 6 meters wide and 9 meters long . what is the perimeter of the board

Answer 1

Answer:

Perimeter of a rectangular board is 70 cm.

Length = x cm.

∴2( width +x)=70

⇒ width =

2

70−2x

⇒width =(35−x) cm

Area = 300cm

2

⇒x(35−x)=300

⇒35x−x

2

−300=0

⇒x

2

−35x+300=0

⇒x

2

−15x−20x+300=0

⇒x(x−15)−20(x−15)=0

⇒(x−15)(x−20)=0

⇒x=15, x=20

Width=35−15, Width=35−20

= 20 cm, = 15 cm

Answer 2

Answer:

30 meter

Step-by-step explanation:

perimeter of rectangle=2(l+b)

=2(6+9)

=2(15)

=30m

very easy