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 Class 7 Mathematics Length, Perimeter and Area: Perimeter and Circumference

The diagram below represents Ojil’s piece of land. He put fence around it. How many posts did he use if the spacing between the posts was 3 metres ?
figperimeter19520201030.JPG
A. 120
B. 90
C. 360
D. 121

 (3m 45s)
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