SOLUTION: A grazing land can feed a certain number of cows in one year (365days). If the number of cows doubles and half of the grazing land dried, how many days can the grazing land feed al

Algebra ->  Finance -> SOLUTION: A grazing land can feed a certain number of cows in one year (365days). If the number of cows doubles and half of the grazing land dried, how many days can the grazing land feed al      Log On


   

Question 1159014: A grazing land can feed a certain number of cows in one year (365days). If the number of cows doubles and half of the grazing land dried, how many days can the grazing land feed all the cows?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
1, the amount of land grazed
n, original cattle quantity
r, graze rate for one cow
365, original graze time
x, the unknown graze time in days for the question condition

rn%2A365=1

For the question, 2n%2Ar%2Ax=1%2F2

nr%2Ax=1%2F4
Divide this equation by the original equation,
x%2F365=1%2F4
x=365%2F4

Between 91 and 92 days, closer to 91 days




(calculated 91.25)