a motoboat travelling at full speed against the current goes 14miles an hour.travelling at a half speed with the current goes 10miles an hour .find the rate of the current and the maximum speed of the boat
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/31 19:22:06
a motoboat travelling at full speed against the current goes 14miles an hour.travelling at a half speed with the current goes 10miles an hour .find the rate of the current and the maximum speed of the boat
一艘摩托艇,若逆流全速行驶,速度为14英里/小时.若顺流半速行驶,速度为10英里/小时.求水流速度和摩托艇的最高速度.
设水流速度是x,摩托艇的最高速度是y
y-x=14
x+(y/2)=10
解得,x=2,y=16
水流速度是2英里/小时,摩托艇的最高速度是16英里/小时.
a motoboat travelling at full speed against the current goes 14miles an hour.travelling at a half speed with the current goes 10miles an hour .find the rate of the current and the maximum speed of the boat
英语翻译climb delicious dream enjoyable form magazine prize visit watch world John and Tom have entered a competition.Tom read about it in a(1)_______.They wanted to win the_______.It was a holiday in the USA.Tom has often dreamed about travellin
求2-3分钟的英语口语作文,一共3篇,谢谢~~O(∩_∩)O~~1). Tell a funny or interesting story of your travellin experience. where was it? when was it? who was there ?what happend?2). Talk about health problem, for example ,what habits do y
句型转换.1.You can't expect people to work for free.You can't expect people to work ___ ___ ___.2.Miss Li gave the lesson to us,and we loved the lessons.We loved the lessons ___ ___ ___ by Miss Li.3.Upon finishing has studies,he started travellin
句型转换.1.You can't expect people to work for free.You can't expect people to work ___ ___ ___.2.Miss Li gave the lesson to us,and we loved the lessons.We loved the lessons ___ ___ ___ by Miss Li.3.Upon finishing has studies,he started travellin
a
a
a
a
a
a
a
a
a
a
a
a
a