violet takes 1 minute to cross a bridge, sente 10, scarlet 5, and kurt 2 minutes how could they cross the brid
414550
Damn it, rephrase the question please!!! you could try typing everything in the body part of the query...
38833
We need to know how wide the road is. If it's a two lane road, it would only take about a second to cross.
683205
About 1000 feet per sec.
433748
For every kilometer of the distance from Rome, Sam spent a total of 36 minutes in travel:  30 minutes riding out on the elephant (it takes 30 minutes to go one kilometer at 2 kilometers per hour) and 6 minutes riding back on the chariot (the time it takes to go 1 kilometer at 10 kilometers per hour).  \n\nThere is 1080 minutes in 18 hours (18*60=1080).  Divide 1080 by 36 and you get 30 kilometers.\n\nCheck your answer:\n\nTo go 30 kilometers out by elephant at 2 kilometers per hour takes 15 hours.\n\nTo go 30 kilometers back by chariot at 10 kilometers per hour takes 3 hours.\n\n15 hours + 3 hours = 18 hours.
518470
six and a half minutes?
273473
Let's assume time measurement was started when the front of the train just entered the tunnel.\n\nThe train travels 1 mile per minute.\n\nIn 1 minute:\nThe front of the train just emrges out of the tunnel.\nThe rear end of the train had just entered the tunnel.\n[ie. The whole train is inside the tunnel now; the front is just about to emerge out]\n\nIn 2 minutes:\nThe rear end of the train emerges out (ie. leaves) the tunnel. Now the train has completely emerged out.\nThe front end of the train is 1 mile away from the tunnel.
1116075
The two trains are moving towards each other at a speed of 25 mph each.  Thus at a speed of 50 mph relative to each other.  Since they started 100 miles apart, it will take them 2 hrs to reach each other.\n\nThey fly flew at a constant speed of 37 mph for 2 hrs.  Thus the fly flew 74 miles.
481556
Sandy, and here's why:\n\nlet's say the distance is 30 miles (you can plug any number into this and you will get the same result).\n\nJack's total trip takes him 4 hours (1 from x to y, 3 from y back to x).\n\nSandy's total trip takes her 3 hours (1.5 from x to y, 1.5 from y back to x).\n\nRegardless of distance, Sandy wins.
1129113
It is 9.8 m/sec , some they have made it 10 :)
864791
A.) 3.02891 seconds\nB.) 290.1 m/s\n\nTrust me... =)
301607
C+D cross first 2 mins\nD returns for 1 min\nA+B cross for 10 mins\nC returns for 2 mins\nC+D cross for 2 mins\nTotal 17 minutes
799226
They travelled a total of 476 miles in 4 hours.  So together they are travelling (476/4) mph or 119 mph.\n\nSo you have two equations:\nJ + S = 119\nJ - S = 5\n\n2J = 124\nJ = 62 mph\nS = 57 mph
682840
Steps\n1)First boy & first man cross the river & the man get down& the boy went back.\n2)The boy & second man cross & the boy get down & the second man went back\n3)Second boy & second man cross the river & the second man get down& the second boy went back.\n4)Second boy & third man cross the river & get down.
853438
If 2 pipes take 3h 15min, u should change it to minutes and multiply it by 2 to find the time it takes 1pipe. 3h 15mins= 195 mins\n195x2= 390 mins\nThen divide by 5 to calculate the time it takes 5 pipes.\n390/5= 78 mins\nConversion to hours = 1hour 18mins
448749
Lisa = L, Jen = J\nL+J=25\nwe know from the question L=4J  \nso L+J=25 becomes\n         \n          4J+J=25\n          5J=25\n           J=25/5\n            J=5  so we get Jen catches 5 frogs \n                           Lisa catches 20 frogs
1175600
They will meet when:\n\n4mph x Time = 3miles - 5mph x Time\n\nSo the answer is 0.33333 hours \n\nOr just 20 minutes.\n\n(not 27)
1181326
Tim is right.  i just want to explain it further so you will understand.\n\nso the problem is we are looking for the time spent in both trips. lets call it "X". one is 1 hour longer than the other so we can call it "X + 1". \n\nif trip1 with a distance of 180 miles is taken in X with an additional 1 hour we can call this equation as 180 per X+1 or in mathematical form its 180/(X+1)\n\nif trip 2 with a distance of 135 miles is taken in X we can call it 135 per X or 135/X\n\nwe have now 2 equations 180/X+1 and 135/X\n\nsince the rates are the same we can say that the rate for 180/(X+1) is equal to rate for 135/X.  or in equational form it is\n180/(X+1)=135/X.\n\nWe now have a working equation.  If you notice, we are dealing with fractions and to equate it we need to transpose it using cross multiplication.  Cross multiplication is done by pairing the numerator of one side to the denominator of the other side and then proceed to multiplication.\n\nlooking at the working equation, we will pair 180 and X or 180X and another pair which is 135 and (X+1) or 135(X+1)\n\nnow we have a new working equation 135(X+1) = 180X\n\nto simplify 135(X+1) we multiply 135 with X and with 1. 135 and X is equal to 135X and 135 and 1 is equal to 135\n\nnow we have simplified the equation to 135X + 135 = 180X\n\nto get the value of X, we combine similar terms.  they are 135X and 180X.  We combine this by transposition.  Remember that in order not to change the value of the equation we must change the sign of what is moved to another side.  In this case i will move 180X to pair it with 135X and move 135 to the other side. so now we get 135X - 180X = -135\n\nwe simplify the like terms and we get -45X.\n\nnow we have -45X = -135\n\nbut we are only looking for X so we must eliminate -45 from the X.  identify the numerical coefficient of X which is -45 and devide it from the original. what you do to one side, you should also do it to the other.\n\n-45X/-45 = -135/-45 with this equation we can simplify it into\nX=3\n\nnow we have the value for X\n\nso one trip will be 3 and since another is 1 hour longer then it must 3 + 1 = 4\n\nheres the solution\n\n180/(X+1)    =      135/X\n135(X+1)     =      180X\n135X + 135   =    180X\n135X - 180X   =    -135  \n            -45X   =    -135\n         -45X/-45=    -135/-45\n                   X =  3\n          \n             X + 1 =  trip 2\n             3+1 = 4