It takes 4 hour for two pipes to simultaneously fill up a sw
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It takes 4 hour for two pipes to simultaneously fill up a swimming pool,the smaller pipe would take 6 hour longer than the larger pipe.Find the time it would take the larger pipe to fill up the swimming pool.
以上是该数学题,最好有说明,因为我完全不懂
以上是该数学题,最好有说明,因为我完全不懂
两个管同时灌满一游泳池花4小时,分开的话较小的一个比较大的一个多花刘小时,问大的一个单独灌满游泳池要花几小时?
设 为 x 小时,体积为V立方米
则小的 花 (x+6) 小时
大的速率为 V/x 立方米/小时
小的速率为 V/(x+6) 立方米/小时
列式:
4×『 V/x + V/(x+6)』= V
(x-1)^2 = 25
得x=6 或 -4(负数舍去)
设 为 x 小时,体积为V立方米
则小的 花 (x+6) 小时
大的速率为 V/x 立方米/小时
小的速率为 V/(x+6) 立方米/小时
列式:
4×『 V/x + V/(x+6)』= V
(x-1)^2 = 25
得x=6 或 -4(负数舍去)
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