Disease

Farmers'cooperative had a supply of feed for 50 cows to 6 days. Cows got insidious disease after 4 days, 10 of them died. How many total days that farmers had feed for cows?

Result

x =  6.5

Solution:

x=4+(50 650 4)/(5010)=132=6.5x=4+(50 \cdot \ 6-50 \cdot \ 4)/(50-10) = \dfrac{ 13 }{ 2 } = 6.5



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