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Playground used to be a long 70 meters wide and 50 meters through the broadened rectangle length and

12245431712010-04-06 00:11:33 +0000 #1
help. . . . . . . . .
Janey6542010-04-06 00:20:06 +0000 #2
playground of the original size: 70 * 50 = 3500 square meters to the long now: 70 +40 = 110 m

m is the width: 50 +40 = 90 meters to the present area of the "110 * 90 = 9900 square meters = 6400 square meters

9900-3500

so:

now the playground than in the past to increase the 6,400 square meters

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