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# Hello. Can you guys help? How many minutes is it until 5:00 if forty minutes ago it was...

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Hello. Can you guys help? How many minutes is it until 5:00 if forty minutes ago it was four times as many minutes past 2 o'clock?

Posted by dcnaser on December 3, 2008 at 10:12 AM via web and tagged with math, minutes and clocks

High School Teacher

(Level 1) Educator Emeritus

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Lets start with the current time and assume that the remaining minutes equal m

then the current time is 5:00 - m

now forty minutes ago......

5:00 - m - 40 = 4m + 2:00

4:20 -m = 4m + 2:00

4:20 - 2:00 = 5m

2:20 = 5m        now, 1 hour = 60 minutes.

then,                 140 = 5m

then,               m = 140/5 = 28 minutes

the time is 28 mimnutes till 5

hope that helps.....

Posted by hala718 on December 3, 2008 at 10:22 AM (Answer #1)

College Teacher

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Let name the starting time, x

5:00 - 40 minutes - x=  4x + 2:00

4:20-x= 4x+2:00

4x+x = 4:20 - 2:00

5x = 2:20

Now, convert 2:20 into minutes, which is actually two hours and 20 minutes. 1 hour= 60 minutes, so 2*60+20= 140 minutes

5x=140 minutes

x= 28 minutes

So, it is 28 minutes until 5:00, which is 4:32 am/pm

Posted by revolution on July 17, 2010 at 9:21 PM (Answer #2)