Question

The odometer of a vehicle has an initial reading of $22256\text{km}$. After the trip, it shows a reading of $22356\text{km}$. If the time taken for the trip is $5$ hours, what is the average speed of the vehicle in ${\text{m s}}^{-1}$?

• A. 5.556

Answer 1

The correct option is A 5.556
Given:
Odometer reading, before the trip $=22256\text{h}$
Odometer reading, after the trip $=22356\text{h}$

So the distance travelled in the trip$=22356-22256=100\text{km}$

Time taken for the trip $=5\text{h}$

Average speed = $\frac{\text{Total distance travelled}}{\text{Total time taken}}$

$\therefore$Average speed $=\frac{100}{5}=20{\text{km h}}^{-1}$

$1{\text{km h}}^{-1}=\frac{10}{36}{\text{m s}}^{-1}$

$20{\text{km h}}^{-1}=20\times \frac{10}{36}{\text{m s}}^{-1}$

$=5.556{\text{m s}}^{-1}$