rubayabashar rubayabashar
  • 10-03-2014
  • Mathematics
Answered

a rectangle has an area of 30 square meter and a perimeter of 34 meters. what are the dimensions of rectangle?

Answer :

iloveonedirection
iloveonedirection iloveonedirection
  • 25-07-2014
[tex]A=lw[/tex]
[tex]P=2l+2w[/tex]

[tex]30=lw[/tex]
[tex]34=2l+2w[/tex]

[tex]30=lw [/tex] --> [tex] w= \frac{30}{l} [/tex]

[tex]34=2l+2( \frac{30}{l}) \\ 34=2l+ \frac{60}{l} \\ 34l=2l^2+60 \\ 2l^2-34l+60=0 \\ 2(l-2)(l-15)=0 \\ l=2, 15[/tex]

[tex]30=(2)w[/tex]
[tex]15=w[/tex]

[tex]30=(15)w[/tex]
[tex]2=w[/tex]

The dimensions can either be 15 x 2 or 2 x 15.
Answer Link

Other Questions

what is 1449 as a decimal
Which describes the people who lived in Australia in the years up to the late 1700s CE They relied primarily on fish as the mainstay of their nutrition They cou
Whats a risk assessment
which island country lies off chinaKorea Russia
What organisms capture the energy from the sun
Solve cos X sin X 0 Pls all answers in radians thanks
Do earthquakes most often occur at faults that are away from plate boundaries
In June Ryan sold twice as many newspaper subscriptions as George In July Ryan sold 5 fewer subscriptions than he did in June while George sold 3 more subscript
What are the advantages and disadvantages to a home user of replacing dialup Internet access with broadband
Why was the postwar situation in Germany especially bad