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Travelling 190 miles @ 70pmh... The answer is 2 hours 43 minutes (rounded to the nearest minute)
Start both timers, when the four minute timer is done, there will be 3 minutes of sand left in the top of the seven minute timer.Restart the four minute timer, while letting the remaining (3 minutes) of sand to drop from the 7 minute timer. (this is your 1st 3 minutes of your nine minute measurement)When the 7 minute timer is done the 4 minute timer will now have 3 minutes of sand in the bottom. Flip the 4 minute timer (when this runs it will be your second 3 minutes of time). At the same time flip the 7 minute timer.When the 3 minutes of sand run on the 4 minute timer, restart the 7 minute timer by this time 3 minutes worth of sand will have gone to the bottom of the timer, resetting it will give you the last 3 minutes of sand for you last 3 minutes of time measuring the 9 nine minutes.
.5 miles in .8 minutes = 5 miles in 8 minutes = 5/8 miles per minute = 0.625 miles per minute or 37.5 miles per hour..5 miles in .8 minutes = 5 miles in 8 minutes = 5/8 miles per minute = 0.625 miles per minute or 37.5 miles per hour..5 miles in .8 minutes = 5 miles in 8 minutes = 5/8 miles per minute = 0.625 miles per minute or 37.5 miles per hour..5 miles in .8 minutes = 5 miles in 8 minutes = 5/8 miles per minute = 0.625 miles per minute or 37.5 miles per hour.
60 seconds = 1 minute so 329 seconds = 5.4833... minutes. So simple!60 seconds = 1 minute so 329 seconds = 5.4833... minutes. So simple!60 seconds = 1 minute so 329 seconds = 5.4833... minutes. So simple!60 seconds = 1 minute so 329 seconds = 5.4833... minutes. So simple!
About three minutes.