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 Question from Jennifer, a parent: A Farmer's pasture measures 100 feet by 108 feet. Each cow needs 4 square yards of pasture to have enough grass. How many Cows should the farmer put in this pasture? If he builds a fence around the pasture 5 feet inside the edge, how much fencing would he need? Does this change the number of cows that can be kept in the pasture? If so, why ? PLease help me

Hi Jennifer,

The pasture has an area of 100 × 108 = 10,800 square feet. Each cow needs 4 square yards of pasture and there are 3 feet in a yard so 4 yards2 = 4 (3 feet)2 = 4 × 32 feet2 = 36 square feet. How many 36 square feet regions are there in 10,800 square feet?

Draw a diagram for the next part.

The brown fence is 5 feet inside the boundaries on each side and gives a new pasture area that is L feet long by W feet wide. How long is L? How long is W? What is the area L × W of the smaller pasture? How many 36 square feet regions are there in this smaller pasture?

Penny

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