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Started By
Message
Math riddle for the OT
Posted on 4/21/22 at 8:04 am
Posted on 4/21/22 at 8:04 am
In words, an old car travels the 1 mile ascent at a speed of 15mph. The hill's descent is 1 mile long as well. How fast does the car have to travel on the descent to achieve an average speed of 30mph for the whole trip?
I'm sure it's already been posted before, but who doesn't love a thread to go 8 pages arguing about a problem?
32
Posted on 4/21/22 at 8:05 am to Ingeniero
288
Posted on 4/21/22 at 8:06 am to MikeBRLA
quote:
288
Nah, 2.
Posted on 4/21/22 at 8:07 am to Ingeniero
This post was edited on 4/21/22 at 8:08 am
Posted on 4/21/22 at 8:09 am to Ingeniero
I think 45mph on the one mile descent would do the trick.
Posted on 4/21/22 at 8:09 am to Ingeniero
Vee not tee, and vee not tee plus one half gee tee square.
This post was edited on 4/21/22 at 8:12 am
Posted on 4/21/22 at 8:10 am to Ingeniero
Tree fiddy.
Duh
Duh
Posted on 4/21/22 at 8:10 am to Ingeniero
45 mph
Posted on 4/21/22 at 8:11 am to Ingeniero
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Posted on 4/21/22 at 8:12 am to Ingeniero
I like word riddles better.
45 mph?
45 mph?
Posted on 4/21/22 at 8:12 am to Ingeniero
Idk but the driver would get better gas mileage going 80
Posted on 4/21/22 at 8:12 am to Ingeniero
15mph
Posted on 4/21/22 at 8:12 am to Ingeniero
the easy answer seems to be 45, but I would imagine its something else
ETA. as I thought, its not 45. but I wont spoil it
ETA. as I thought, its not 45. but I wont spoil it
This post was edited on 4/21/22 at 8:15 am
Posted on 4/21/22 at 8:12 am to Ingeniero
The mom is the Dr.
Posted on 4/21/22 at 8:13 am to Ingeniero
quote:
Posted on 4/21/22 at 8:14 am to Ingeniero
That’s easy…
The faster you drive the more gas you will save, tailgate down of course
The faster you drive the more gas you will save, tailgate down of course
Posted on 4/21/22 at 8:14 am to Ingeniero
Not possible. Can't travel fast enough.
This post was edited on 4/21/22 at 8:15 am
Posted on 4/21/22 at 8:16 am to Ingeniero
It can’t.
ETA: Here’s how I thought it out. 30 mph over 2 miles takes 4 minutes. But if you go 15 mph for the first mile, you already used up those 4 minutes you need.
ETA: Here’s how I thought it out. 30 mph over 2 miles takes 4 minutes. But if you go 15 mph for the first mile, you already used up those 4 minutes you need.
This post was edited on 4/21/22 at 8:19 am
Posted on 4/21/22 at 8:16 am to Ingeniero
It's impossible. To average 30 MPH you would have to do the drive in 4 minutes. It will take that long to get to the top so you would have to complete the downhill part instantly to make the average.
Dammit, Ell beat me.
Dammit, Ell beat me.
This post was edited on 4/21/22 at 8:20 am
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