Flowerbed

We enlarged the circular flower bed, so its radius increased by 3 m. The substrate consumption per enlarged flower bed was (at the same layer height as before magnification) nine times greater than before. Determine the original flowerbed radius.

Correct answer:

r1 =  1.5 m

Step-by-step explanation:

r2 = r1 + 3 S2 = 9 S1 π r22 = 9 π r12 r22 = 9 r12 r2 = 3 r1  r2=r1+3 r2=3 r1  r1r2=3 3r1r2=0  Pivot:Row1Row2 3r1r2=0 r1r2=3  Row231 Row1Row2 3r1r2=0 0.67r2=3  r2=0.666666673=4.5 r1=30+r2=30+4.5=1.5=1.5 m  r1=23=1.5 r2=29=4.5



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