# Solving Speed Problems Step 4: Use the chart to write an equation that can be solved.In this case, since the boat took the same amount of time to go up the river as it did to go down the river, we set the times equal to each other.

Step 4: Use the chart to write an equation that can be solved.In this case, since the boat took the same amount of time to go up the river as it did to go down the river, we set the times equal to each other.Each day for four days, Linda traveled for one hour at a speed that resulted in her traveling one mile in an integer number of minutes.

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He drives miles in the first hour, but realizes that he will be hour late if he continues at this speed.

He increases his speed by miles per hour for the rest of the way to the airport and arrives minutes early. Note that he drives at miles per hour after the first hour and continues doing so until he arrives. Let us call the total number of miles after David changes speed .

Given One Distance and One Time Period Given Multiple Distances in Different Amounts of Time Given Multiple Speeds for Different Amounts of Time Given Two Speeds for Half the Time Given Two Speeds for Half the Distance Show 2 more... Article Summary Questions & Answers Related Articles References This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness.

Together, they cited information from 8 references. But sometimes you are given two different speeds used for some periods of time, or over some distances.

Notice that the answer x = –12/5 was discarded because a bike can not go negative 2.4 miles per hour.

Click Here for Practice Problems Example 3 – A Steamboat can travel at an average speed of 11 miles per hour in still water.

wiki How's Content Management Team carefully monitors the work from our editorial staff to ensure that each article meets our high quality standards. In these instances, other formulas exist for calculating the average speed.

These types of problems might be useful to you in real life, and often appear on standardized tests, so it is helpful to learn these formulas and methods. Since he runs ten rounds, you have to multiply the circumference by 10: 87.92 x 10 = 879.2 (879 rounded) Next, it says he completed the run in 10 minutes, but the answer needs to be in seconds, so convert by multiplying 10 x 60 = 600.

Next reread the problem and fill in the chart with as much information as you can.

Finally, use some common sense and decide if the answer found in step 6 makes sense.