SOLUTION: Draw a rectangle of perimeter 30 cm and lengths of sides in the ratio 1 : 2.

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Question 941066: Draw a rectangle of perimeter 30 cm and lengths of sides in the ratio 1 : 2.
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
given:
a rectangle of perimeter P=30cm and
lengths of sides in the ratio 1+%3A+2
P=2%28L%2BW%29
=>30cm=2%28L%2BW%29
=>15cm=L%2BW
=>L=15cm-W................eq.1
if the ratio of sides lengths 1+%3A+2, then
W%3AL=1+%3A+2
=>2W=1L
=>L=2W................eq.2
from eq.1 and eq.2, we have
15cm-W=2W.........solve for W
15cm=2W%2BW
15cm=3W
highlight%28W=5cm%29
now find L
L=2W................eq.2
L=2%2A5cm
highlight%28L=10cm%29
draw it: