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The length and the width of the rectangle is in ratio3:5. Its area is 375m^2. Find its perimeter.
Pls. Write the whole solutions.


Sagot :

 A_________________.B            ABCD rectangle
   |                                  |              BC/AB=3/5
   |                                  |              A ABCD=375 m²
   |_________________|             ---------------------------------------
  D                                 C            P ABCD=??
--------------------------------------------------------------------------------------
BC/AB=3/5⇒BC=3AB/5
A=AB·BC
AB·3AB/5=375
3AB²/5=375
3AB²=1825
AB²=625
AB=25 m
BC=375:25
BC=15 m
P ABCD=2(AB+BC)
P ABCD=2(25+15)
P ABCD=2·40
P ABCD=80 m