The clock in my lounge room is 10 minutes slower than the clock on my phone, which is 6 minutes slow. My tram always leaves 6 minutes early, although it is scheduled for 8:55am. It takes me 20 minutes to get to the tram stop.
What time must I leave, according to my lounge room clock, in order to catch my tram?

Question

The clock in my lounge room is 10 minutes slower than the clock on my phone, which is 6 minutes slow. My tram always leaves 6 minutes early, although it is scheduled for 8:55am. It takes me 20 minutes to get to the tram stop.
What time must I leave, according to my lounge room clock, in order to catch my tram?

goformit100 · Answer

@Ashley16

lgbasallote · Answer

@shirleyx is 8:55 am right time? or according to your defective clocks?

anonymous · Answer

it is a math problem, not actually relevant to me :)

lgbasallote · Answer

lol i know =)) im asking about the problem :))

lgbasallote · Answer

it was saying "my" so i used "your" ;)

anonymous · Answer

i actually don't know >< its from a practise exam for a selective school! i think it means the tram is supposed to come at that time.

lgbasallote · Answer

anyway...let's do a reverse analysis

the tram leaves 6 minutes before 8:55

therefore it leaves at 8:49 am

it takes you 20 minutes to get to the stop so let's subtract 20 minutes

8:29 (right time) is the time you should leave

your phone is 6 minutes slow so in your phone when it's already 8:29 your phone's clock still says 8:23 am

now your lounge clock is 10 minutes slower..so subtract 10 minutes..what do you get ;)

anonymous · Answer

subtract ten minutes from 8:23 or 8:29?

lgbasallote · Answer

from 8:23 because the lounge clock is 10 minutes slower than the phone...and the phone time is 8:23

anonymous · Answer

so the answer is 8:13? thanks!

lgbasallote · Answer

yep 8:13 ^_^