Resources for Speed
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Questions
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Speed Theory
![\begin{multicols}{2} \textbf{Example 1}\\ A car travels for 3 hours at \(90 \text{~km} / \text{h}\) and then travels a further distance of \(160 \text{~km}\) in 2 hours. What is the average speed of the trip?\\ \textbf{Example 1 solution}\\ \(\text { First part of journey, distance }\) \(\begin{aligned}[t] & =3 \times 90 \\ & =270 \text{~km} \end{aligned}\)\\ Second part of journey, distance \(=160 \text{~km}\)\\ \(\begin{aligned} \therefore \text { Total distance } & =270+160 \\ & =430 \text{~cm} \end{aligned}\)\\ \(\begin{aligned} \text { Total time } & =3+2 \\ & =5 \text { hours } \end{aligned}\)\\ \(\begin{aligned} \therefore \text { Average speed } & =430 \div 5 \\ & =86 \text{~km} / \text{h} . \end{aligned}\) \columnbreak \textbf{Example 2}\\ It is estimated that a hippopotamus can run at \(30 \text{~km} / \text{h}\). What speed is this in \(\text{m} / \text{sec}\)?\\ \textbf{Example 2 solution}\\ \(\begin{aligned} 30 \text{~km} / \text{h} & =\frac{30 \times 1000 \text{~m}}{60 \times 60 \text{~sec}} \\ & =\frac{300 \text{~m} / \text{sec}}{36} \\ & =8 \frac{1}{3} \text{~m} / \text{sec} \end{aligned}\) \end{multicols}](/media/xnqfzs5n/26364.png)
NSW Y8 Maths Time and Travel Speed
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Videos relating to Speed.
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Speed - Video - Finding the average speed of a car in km per hour
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