# Potatoes

When planting potatoes there are consumed 3 500 kg of seed per 1 ha. Calculate the weight of the seed needed for fitting a square area with a side length 325 meters.

Correct result:

m =  36969 kg

#### Solution:

$S_{1}=1 \ ha \rightarrow m^2=1 \cdot \ 10000 \ m^2=10000 \ m^2 \ \\ m_{1}=3500/S_{1}=3500/10000=\dfrac{ 7 }{ 20 }=0.35 \ \text{kg/m}^2 \ \\ \ \\ a=325 \ \text{m} \ \\ S=a^2=325^2=105625 \ \text{m}^2 \ \\ m=m_{1} \cdot \ a^2=0.35 \cdot \ 325^2=\dfrac{ 147875 }{ 4 }=36969 \ \text{kg}$

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