Question

An automobile travels for 90 minutes along a highway. The graph shows the progress of the automobile, with its start point designated as distance = 0 km.What is the automobile's average speed as it travels from a distance of 5 km to a distance of 15 km along the highway?0.5 km/min1.0 km/min0.67 km/min1.5 km/min

Answer 1

Answer:

0.67 km/min

Step-by-step explanation:

The initial time, t₁ = 15 min

The initial position, d₁ = 5 km

The final time, t₂ = 30 min

The final position, d₂ = 15 km

The average speed is calculated as:

`\begin{gathered} Avg\text{ speed = }(d_2-d_1)/(t_2-t_1) \\ \\ Avg\text{ speed = }(15-5)/(30-15) \\ \\ Avg\text{ spd = }(10)/(15) \\ \\ Avg\text{ spd = 0.67 km/min} \end{gathered}`

The automobile's average speed as it travels from a distance of 5 km to a distance of 15 km along the highway is 0.67 km/min