Sheeps-Grass Field-Days
Algebra
Level
2
5 sheep eat a grass field as large as 15 soccer-sized fields in 10 days. To provide the sheep grass, the shepherd pays $100 per 1 soccer-sized fields. How much money does the shepherd pay to provide grass for 10 sheep in 15 days?
The answer is 4500.
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1 solution
Since 5 sheep eat 15 soccer-sized fields in 10 days, it means that 1 sheep eats 3 soccer-sized field in 10 days.
So, in 10 days, 10 sheep eat 30 soccer-sized fields.
1 5 = 3 x 2 1 0
So, in 15 days, 10 sheep eat 45 soccer-sized fields.
Thus, 45 soccer-sized fields costs the shepherd $4500.