单选题Two boards are being cut for a construction project. If the total length of the boards is 100 inches and the shorter board is 5 inches less than half the length of the longer board, what is the length of the shorter board?A25 inchesB30 inchesC35 inchesD65 inchesE70 inches
单选题
Two boards are being cut for a construction project. If the total length of the boards is 100 inches and the shorter board is 5 inches less than half the length of the longer board, what is the length of the shorter board?
A
25 inches
B
30 inches
C
35 inches
D
65 inches
E
70 inches
参考解析
解析：
设长板的长度为x，短板的长度为y，故x+y=100，y=0.5x-5，故y=30，所以本题选B项。
设长板的长度为x，短板的长度为y，故x+y=100，y=0.5x-5，故y=30，所以本题选B项。
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