6th Grade Cattle Grazing Problems: Problem 2

Problem: A pasture grows new grass at a constant speed. 14 cows can finish the entire pasture by 30 days, and 70 sheep can finish the entire pasture by 16 days. The amount of grass a cow consumes per day is four times as much as the amount of grass a sheep consumes per day. How many days will 17 cows and 20 sheep finish the entire pasture?

Key: Convert multiple animals into one animal

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