Problem 2-62 - Distance and speed - Part 7 (a)

A truck travels at \(80 \;km/h\) for \(30 \;min\), then at \(60 \;km/h\) for \(1.5\; hr.\) Assuming 2 significant digits in the given numbers, calculate the truck's
(a) total distance traveled, and
(b) average speed.

Accumulated Solution

\(\text{speed} = \frac{d}{\Delta t} \\ d = \text{(speed)} \Delta t \\ d_1 = 40\; km \\ d_2 = 90 \;km \\ d = 90 + 40 = 130\; km \text{(Answer to part (a))}\)

No. The average speed is \(\text{(total distance)/(total time)}\)

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