用绳子测井深,把绳子三折后量,井外余4米;把绳子四折后量,井外余1米.求井深和绳子的长度.
人气:324 ℃ 时间:2019-10-17 04:31:55
解答
(4-1)÷(
-
)
=3÷
=3×12
=36(米);
井深:36÷3-4=8(米)
答:绳子长36米,井深8米.
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