help!!!Maths(speed)
2010-03-15 3:29 am
Two cities (X and Y) are connected by means of a highway. Car A leaves city X at 10:00am and travels at a speed 52km/h towards city Y. 20 minutes later, car B leaves city X and travels at a speed 60km/h towards city Y. When will the car B catch up car A?
回答 (2)
2010-03-15 3:44 am
✔ 最佳答案
Let x be required time(20/60)52+52x=60x
52(1/3)=8x
x=2.17( 3 Significant Digits)
2.17hour =2hours10minutes
12:10 p.m will the car B catch up car A
2010-03-19 4:09 am
Let x be required time
(20/60)52+52x=60x
52(1/3)=8x
x=2.17( 3 Significant Digits)
2.17hour =2hours10minutes
12:30 p.m will the car B catch up car A
(20/60)52+52x=60x
52(1/3)=8x
x=2.17( 3 Significant Digits)
2.17hour =2hours10minutes
12:30 p.m will the car B catch up car A
參考: 樓上錯了
收錄日期: 2021-04-24 23:22:08
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https://hk.answers.yahoo.com/question/index?qid=20100314000051KK01520