Three rectangles

Some wire is used to make 3 rectangles: A, B, and C. Rectangle B's dimensions are 3/5 cm larger than Rectangle A's dimensions, and Rectangle C's dimensions are again 3/5 cm larger than Rectangle B's dimensions. Rectangle A is 2 cm by 3 1/5 cm.

What is the total area of all three rectangles?

Correct answer:

S =  30.36 cm2

Step-by-step explanation:

a1=2 cm a2=315=3+15=3 5+15=165=3.2 cm x=35=0.6 cm  b1=a1+x=2+0.6=135=2.6 cm b2=a2+x=3.2+0.6=195=3.8 cm  c1=b1+x=2.6+0.6=165=3.2 cm c2=b2+x=3.8+0.6=225=4.4 cm  S1=a1 a2=2 3.2=325=6.4 cm2 S2=b1 b2=2.6 3.8=24725=9.88 cm2 S3=c1 c2=3.2 4.4=35225=14.08 cm2  S=S1+S2+S3=6.4+9.88+14.08=75925 cm2=30925 cm2=30.36 cm2



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