anonymous
  • anonymous
my watch showed the correct time at 12 noon, but then the battery started to run down untill it eventually stopped completely. between 12 noon and when it stopped, it lost 20 minutes per hour on average.it now shows 6 pm but it stopped 4 hours ago. what is the correct time now? a.1am b.2am c.12am d.11am
Mathematics
jamiebookeater
  • jamiebookeater
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amistre64
  • amistre64
its 903pm in florida ;)
anonymous
  • anonymous
i know that its 9 03pm there coz i m from there too
anonymous
  • anonymous
but i need answer for the above question can anyone help me plz?

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amistre64
  • amistre64
my watch showed the correct time at 12 noon, but then the battery started to run down untill it eventually stopped completely. between 12 noon and when it stopped, it lost 20 minutes per hour on average. it now shows 6 pm but it stopped 4 hours ago. 12 + (1 -1/3) + (1 -1/3) + (1 -1/3+... 12 + 6 hours is 18 hours total 12 + (1 -1/3)x = 18
amistre64
  • amistre64
x - (1/3)x = 6 (2/3)x = 6 x = 9 it would take 9 hours for it to reach 6 o'clock
amistre64
  • amistre64
12 + 9 + 4 = 15 hours that have passed since noon
anonymous
  • anonymous
the correct answeer is option no a .1 am
anonymous
  • anonymous
but couldnt solve ..
amistre64
  • amistre64
yeah, 1 am. 12 + 9 = 9pm + 4 hours = 1am
amistre64
  • amistre64
do you see how I did it?
anonymous
  • anonymous
how 1/3 cam there.
amistre64
  • amistre64
20 minutes is 1/3 of an hour right?
anonymous
  • anonymous
ye
amistre64
  • amistre64
12 + 1 would be a normal hour correct? but it loses 1/3 hour each time. 12 + (1 -1/3) is how the watch runs...
amistre64
  • amistre64
it ran like that till it hit 6 oclock; which is 18 hours in total for the day right?
amistre64
  • amistre64
12 + (1 -1/3)(x hours) = 18 (1 -1/3)(x hours) = 18-12 = 6 (2/3)(x hours) = 6 hours x = 6(3)/2 = 18/2 = 9 9 hours it ran slow then died. 12 + 9 = 9pm + 4hours = 1am
anonymous
  • anonymous
oh i got direclty howz that like.......its 3 hrs lost and it is added to 6pm and it becomes 9pm and it stoppped 4 hrs ago so we can add 9pm+4hrs=1 am.....thanks buddy am i right??

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