SOLUTION: the sides of a rectangle are in the ratio of 3:2.if the lenght is 15 cms, what is its peremeter

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Question 696623: the sides of a rectangle are in the ratio of 3:2.if the lenght is 15 cms, what is its peremeter

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

the sides of a rectangle L and W are in the ratio of 3%3A2

L%3AW=3%3A2
=>..3W=2L
=>..W=2L%2F3

if the length L is 15cm,then
first find W
=>..W=2%2815cm%29%2F3

=>..W=2%28cross%2815%295cm%29%2Fcross%283%29
=>..W=2%2A5cm
=>..W=10cm

its perimeter will be:
P=2%28L%2BW%29
P=2%2815cm%2B10cm%29
P=2%2825cm%29
P=50cm