Question

The distance travelled by Sara is shown in the below distance-time graph.


How long has she travelled in-between $4$ hours to $8$ hours in km?

• A. $20$
• B. $30$
• C. $0$
• D. None of the above

Answer 1

The correct option is C $0$


$\underset{–}{\text{Method-1:}}$

From the given graph, it is clear that the graph is horizontal (parallel to $x$-axis) in-between $4$ hours to $8$ hours as there is no deviation along $y$-axis (Distance axis).

$\therefore$ The distance travelled by Sara in that interval of 4 hours to 8 hours is $0$ km.

$\underset{–}{\text{Method-2:}}$

From the above graph, we can conclude:
Distance travelled in $4$ hours = $20$ km
Distance travelled in $8$ hours = $20$ km

Now,
Distance travelled in-between $4$ hours to $8$ hours = (Distance travelled
in 8 hours) - (Distance travelled in 4 hours)
$\therefore$ Distance travelled in the interval of $4$ hours to $8$ hours = $20$ km-$20$ km = $0$ km