# Grass seeds

How many kg of grass seed is needed to be sowing a circular field with a diameter of 120 meters when the 1 m2 should be used 0.8 grams seeds?

Correct result:

x =  9.05 kg

#### Solution:

$x=\pi \cdot \ (120/2)^{ 2 } \cdot \ (0.8/1000)=9.05 \ \text{kg}$

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