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5. An airplane flies with a constant speed of 640 km/h. How long will it take to travel adistance of 1920 kilometers?

User Anton Unt
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1 Answer

3 votes

To solve this problem we need to apply the average speed formula, which is shown below:


\text{speed = }(dis\tan ce)/(time)

We need to find the time, therefore we will arrange the equation in order to isolate the time on the left side as shown below:


\begin{gathered} \text{time}\cdot\text{speed = distance} \\ \text{time = }\frac{dis\tan ce}{\text{speed}} \end{gathered}

Applying the data from the problem:


\begin{gathered} \text{time = }(1920)/(640) \\ \text{time = 3 h} \end{gathered}

User Pnklein
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