The excursion boat on the river takes 2.5h; hours to make the trip to a point 12 miles upstream and to return.If the rate at which the boat travels in still water is 5 times the rate of the river current,what is the rate of the current?
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The excursion boat on the river takes 2.5h; hours to make the trip to a point 12 miles upstream and to return.If the rate at which the boat travels in still water is 5 times the rate of the river current,what is the rate of the current?
设 the rate of the current is v,则 the rate of the boat travels is 5v,
有12/(4v)+12/(6v)=2.5,v=2
河上的游艇需要2.5小时,小时完成了这趟旅程上游和返回12英里。如果船旅行的速度在静水河的5倍,当前的速度是什么?
中文解释为:河上的游艇需要2.5小时,小时完成了这趟旅程上游和返回12英里。如果船旅行的速度在静水河的5倍,当前的速度是什么?
设速度为x则6/(5x-x)+6/(5x+x)=2.5
则x=1英里/小时
(a) True;
(b) true;
(c) true;
(d) false;
excursion
excursion
The excursion boat on the river takes 2.5h; hours to make the trip to a point 12 miles upstream and to return.If the rate at which the boat travels in still water is 5 times the rate of the river current,what is the rate of the current?
bring the boat还是take the boat
excursion造句
the Dragon Boat Festival
watch the dragon boat
Look,the children ()(boat)
Rock The Boat 歌词
a boat on the
The Boat House 歌词
英语翻译A visit to Guilin would not be complete without a boat excursion down the lijiang River with which to Yangshuo,83km down stram-a section of the Lijiang River with which visitors will surely be astounded as scenic wonders unfold on both ba
in the boat和on the boat 谁对 谁错?
He put down his name for the excursion.这里面的put
Get in the boat please.
He wanted to______into the boat
happy the dragon boat festival
Rock the boat 如何造句?