Question

The given figure shows the distance-time graph of three cars $A$, $B$ and $C$. Study the graph and answer the following question:

How far has car $B$ travelled by the time it crosses car $C$?

• A. $3.12km$
• B. $9.850km$
• C. $5.143km$
• D. $7.231km$

Answer 1

The correct option is C $5.143km$

From the graph:
Boxes covered in $4km$ = $7$
Hence, $1$ box = $\frac{4}{7}km$
Boxes covered by car $B$ by the time it crosses car $C$ = $9$
Hence, distance traveled by car $B$ when it crosses car $C$
$=\frac{4}{7}\times 9=\frac{36}{7}=5.143km$
Hence, car $B$ has traveled a distance of $5.143km$ when it crosses car $C$.