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 Class 7 Mathematics Length, Perimeter and Area: Length and its Operations

A triangular plot measuring 7.5 metres by 12.5 metres by 15 metres is to be fenced. If the posts are to be 2.5 metres apart, how many posts are needed?
A. 35
B. 17
C. 15
D. 14

 (2m 15s)
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