A rectangular paddock is 45 metres long and 21 metres wide. A farmer wishes to construct a fence around the perimeter of the paddock. The fencing will be fastened to posts positioned 3 metres apart around the perimeter. How many posts will be needed?
Options 44, 24, 35, 40
geometry
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First, evaluate the perimeter of the paddock.ROHIT11111 wrote:A rectangular paddock is 45 metres long and 21 metres wide. A farmer wishes to construct a fence around the perimeter of the paddock. The fencing will be fastened to posts positioned 3 metres apart around the perimeter. How many posts will be needed?
Options 44, 24, 35, 40
Perimeter = 2L + 2W
So the perimeter of the paddock is equal to (2)(45) + (2)(21) = 132.
Next, we know that a post will be placed on the fencing every three meters, so we can simply divide the perimeter by 3 in order to get the number of posts.
132/3 = 44 and the answer is A.
800 or bust!