问答题A rancher is constructing a fence by stringing wire between posts 20 feet apart. If the fence is 400 feet long, how many posts must the rancher use?
问答题
A rancher is constructing a fence by stringing wire between posts 20 feet apart. If the fence is 400 feet long, how many posts must the rancher use?
参考解析
解析：
用400除以20，再加上第一根木桩就是正确的答案。
用400除以20，再加上第一根木桩就是正确的答案。
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