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If Tina swins 4 miles upstream at 1mph and back downstream to the same point at 4 mphwhat is her average speed?
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How fast do you have to run to do a mile in 12 minutes?
Your average speed must be at least five (5) miles per hour.
How many miles an hour do you average to run a four minute mile?
Running a mile in exactly 4 minutes equates to a speed of 15 MPH.
What fraction is before 2 miles?
There cannot be any such fraction. If there was a fraction, F then the average of 2 and F, (2+F)/2 would be before 2, and nearer to 2 than F. And then the average of 2 and that fraction would be before 2 and nearer still. And then the average of 2 and that fraction would be before 2 and nearer still. And so on.
What is 5904 miles to the nearest 100 miles?
5,904 miles to the nearest 100 miles = 5,900 miles
How many miles is 20 percent of 40 miles?
8 miles
If Tina swims 4 miles upstream at 1 mph and back downstream to the same point at 4 miles per hour what is her average speed?
2 Miles An Hour.
If Tina swims 4 miles upstream at 1 mph and back downstream to the same point to the same point at 4 mph what is her average speed?
8 MPH
If Tina swims 4 miles upstream at 1 mph and back downstream to the same point at 4 mph what is her average speed?
Her average speed is 1.6 miles per hour. Average speed is total distance covered by total time taken to do it. She swims 4 miles upstream, and at 1 mph, it takes 4 hours. She comes back downstream at 4 mph and so she covers the 4 miles in 1 hour. Her total mileage is 8 miles. It takes 4 + 1 hours or 5 hours to cover it. The 8 miles divided by 5 hours is 1 3/5 miles per hour, or 1.6 mph for an average speed.
If a motorboat can go 8 miles downstream on a river in 20 mins if the return 8 miles upstream takes 30 minutes what is the speed of the current?
The current is approximately 4 mph.
What is the gradient of the river amzon?
The gradient of the River Amazon is very low. It is 1,000 miles or 1,610 kilometers upstream, and 100 feet or 30 meters downstream.
A man rows upstream for 20 miles in 5 hours and 10 miles downstream in 2 hrs What is the speed of the man in still water?
Speed upstream(S.u) = 20/5 => 4miles/hr Speed downstream(S.d) = 10/2 => 5miles/hr Speed of man in still water(speed of boat in still water)= 1/2 * (S.u + S.d) = 0.5 * (4 + 5) = 0.5 *9 = 4.5miles/hr The speed of man in still water is 4.5 miles/hr
If a boat can go 20 miles per hours in still water and can go six miles downstream and 3 miles up stream in the same time how fast is the river?
assume river velocity = X mph boat velocity = 20 mph time to go 6 miles downstream = T1 time to go 3 miles upstream = T2 distance = time * velocity downstream: 6 mi = T1 * (boat velocity + river velocity) upstream: 3 mi = T2 * (boat velocity - river velocity) 6 = T1 * ( 20 + X ) 3 = T2 * ( 20 - X ) T1 * ( 20 + X ) = 2 * ( T2 * ( 20 - X ) ) since T1 = T2 then 20 + X = 40 - 2X 3X = 20 X = 6.67 thus, river velocity is 6.67mph
A boat on the Missouri river took 2 hours to go 48 miles downstream. The boat took 3 hours to return the same distance upstream. Find the rate of the boat in still water and the rate of the current.?
Boats speed = 24 miles per hour.Current speed = 4 miles per hour.
How many miles upstream is the city of manaus?
about 60
What fishes swim miles upstream to spawn?
salmon
How did the Forty mile gold rush get its name?
The Fortymile gold rush in 1886 was to the Fortymile River, a trans-boundary river with its headwaters in Alaska, USA and its confluence with the Yukon River in the Yukon Territory in Canada. The Fortymile River is so named because the mouth is 40 miles downstream from an old (now defunct) trading post called Fort Reliance, approximately 8 miles downstream of the present site of Dawson City. (There is also a Sixtymile River, which is about 60 miles upstream of Fort Reliance.)
A motor boat can go 2 miles downstream on a river in 3 minutes it takes 15 minutes for the boat to go upstream the same 2 miles find the speed of the current?
Let boat speed = X and current speed = Y Downstream speed = boat speed plus current speed = X + Y Upstream speed = boat speed minus current speed = X -Y Downstream speed = 2 miles divided by 3 minutes = 2/3 miles per minute Upstream speed = 2 miles divided by 15 minutes = 2/15 miles per minute X + Y = 2/3 X - Y = 2/15 add equations 2X = 2/3 + 2/15 = 10/15 + 2/15 = 12/15 = 4/5 divide by 2 X = 4/10 = 2/5 use second equation and find Y as X -Y = 2/15 2/5 - Y = 2/15 6/15 - Y = 2/15 Y = 4/15 = current speed = 0.266 miles per minute
