Rectangle's 81596

The rectangle has a perimeter of 30 cm. The ratio of its sides a: b=2:3. Calculate the sides' lengths and the rectangle's area.

Correct answer:

a =  6 cm
b =  9 cm
S =  54 cm2

Step-by-step explanation:

o=30 cm a:b=2:3 = 2x:3x  o = 2(a+b) = 2a+b2 = 4x+6x = 10x  x=o/10=30/10=3 cm  a=2 x=2 3=6 cm
b=3 x=3 3=9 cm
S=a b=6 9=54 cm2

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