Peter and Tom shared the driving on a certain trip.If Peter and Tom both drove for the same amount of time,but Peter only drove 2/5 of the total distance,what was the ratio of Peter's average speed to Tom's average speed?(A) 1 :5(B) 2 :5(C) 1 :2(D) 3
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 07:52:09
![Peter and Tom shared the driving on a certain trip.If Peter and Tom both drove for the same amount of time,but Peter only drove 2/5 of the total distance,what was the ratio of Peter's average speed to Tom's average speed?(A) 1 :5(B) 2 :5(C) 1 :2(D) 3](/uploads/image/z/10233400-40-0.jpg?t=Peter+and+Tom+shared+the+driving+on+a+certain+trip.If+Peter+and+Tom+both+drove+for+the+same+amount+of+time%2Cbut+Peter+only+drove+2%2F5+of+the+total+distance%2Cwhat+was+the+ratio+of+Peter%27s+average+speed+to+Tom%27s+average+speed%3F%28A%29+1+%3A5%28B%29+2+%3A5%28C%29+1+%3A2%28D%29+3)
Peter and Tom shared the driving on a certain trip.If Peter and Tom both drove for the same amount of time,but Peter only drove 2/5 of the total distance,what was the ratio of Peter's average speed to Tom's average speed?(A) 1 :5(B) 2 :5(C) 1 :2(D) 3
Peter and Tom shared the driving on a certain trip.If Peter and Tom both drove for the same amount of time,but Peter only drove 2/5 of the total distance,what was the ratio of Peter's average speed to Tom's average speed?
(A) 1 :5
(B) 2 :5
(C) 1 :2
(D) 3 :5
(E) 2 :3
Peter and Tom shared the driving on a certain trip.If Peter and Tom both drove for the same amount of time,but Peter only drove 2/5 of the total distance,what was the ratio of Peter's average speed to Tom's average speed?(A) 1 :5(B) 2 :5(C) 1 :2(D) 3
两人骑行的时间相同,peter行了全程的2/5,那么tom行了全程的1-(2/5)=3/5
所以,两人的速度之比=(2/5):(3/5)=2:3
——答案:E
E speed=distance/time
peter's distance=2/5
Tom's distance=3/5
time is the same =1
tom's speed= 2/5
peter's speed=3/5
ratio=2:3