How many grains of sand are there in a 3 minute sand timer?
112290
18936834, give or take a grain.
2556
You're really close! The answer is actually 1:03:11. You were off one minute because you forgot to borrow a minute from the 34 so you could subtract the seconds.
812392
More  than 20 minutes
571914
there are stars out there that haven't been discovered yet.  There is a finite amount of atoms in a grain of sand.  The period at the end of this sentence can hold about 250,000 atoms across.  So a grain of sand would have less atoms than there are stars in the universe.
786356
at 3 sec r = 3*8 = 24m\n\na = pi*r^2\n\nda/dt = d(pi*r^2)/dt \nda/dt = 2*pi*r*(dr/dt)\nda/dt = 2*pi*24*8\nda/dt = 384*pi\nda/dt = 1206.4 meters^2 per sec
901557
lol...I'm learning about this in school...  75divided 3=25, 1/3=25 soo...50 parts sand  is your answer
836747
2,3,1 (nothing goes there) ,6\n\nHope it helps :]
100363
1-2-3\none cement (portland)\n2 sand\n3 rock
1134444
Diameter is 3 inches in length.
741729
there is a 1/8 probablity of getting heads every toss after 3 tosses
109042
13 and a third hours is the number i came up with...\n\nJust plug some fake numbers in, say, for example, the tank that these two pipes are filling is 500 gallans.  then you can figure out how much each pipe put into it, take that five hundred, divide by 8, then multiply by 3, that's how many gallens the smaller pipe put into the tank in 5 hours...   now, take that number and divide by the 5 hours, that's how much that smaller pipe can pour out into the tank in one hour...  to take that 500 gallens and divide by the amount that can be poured in one hour and it'll give you how many hours it'd take to fill at that slower rate...\n\nThis is not a standard way of figuring out this problem, but it seemed like it worked to me, it should have taken more then double the 5 hours, but less then 3 times...   does this help at all??
1065911
If i remember right it is divided into 3 segmients and they are roughtly about 45 minutes, 35 minutes, and 45 minutes. It  sometimes varies.
95602
2:3:1/2 cement sand water\n2:1:2:1/2  cement gravel sand water
518470
six and a half minutes?
352047
Sands? Let me get this straight. You want to know how many sands are available? Holy crap, man. How do you even go about the thought processes to develop that question. Was it a whim? Did you just wake up and decide you wanted to know how many sands are available. First of all, if that question made sense you could pass it off as a moment of insanity. This is just ludricous. How many sands are there? Since this is a ridiculous question, here is a ridiculous answer: fifty-six Bazillion
864791
A.) 3.02891 seconds\nB.) 290.1 m/s\n\nTrust me... =)
421882
2" = 1/6 ft, so 60x20x(1/6) or (60x20)/6 will tell you how many cubic feet of sand you need.  However, these are both expressions.  To make an equation, you would write something like: \nV=60 ft x 20 ft x 1/6 ft \nwhere V is the volume of sand needed.\n\nIt works out to 200 cubic feet, by the way :)\n\nThe two previous answers are basically right except that volume can be expressed in neither square feet nor yards.  These are measures of area and distances, respectively.\n\nnotsomuch77 is right that you can convert from feet to yards by multiplying by 1/3.  However, to convert from _cubic_ feet to _cubic_ yards, you have to muliply by (1/3)^3, which is 1/27.  Basically, you have to muliply each length by 1/3, and when you do it three times it's the same as muliplying the whole thing by 1/27.