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Advanced Math/Garden: Width, Area

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Question
Garden
Garden  
A rectangular garden is to contain an acre.   

Length: 80 yards.

Determine width.

Outside area:

Width: 7 yards.   

Determine area.

Acre = 4840 sq. yds.

Answer
Randy
Randy  
I'm assuming that the "outside area" is not part of the garden.

garden area = 80 yd × W yd = 4,840 yd˛
W = 60.5 yd

dimensions of garden plus outside area:
length = 80 + 2×7 = 94 yd
width = 60.5 + 2×7 = 74.5 yd
total area = 94×74.5 = 7,003 yd˛

outside area = 7,003 - 4840 = 2163 yd˛

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