Question

When a person leaves his home for picnic by his car, the meter reads $12352$ $km$. When he returns home after two hours the reading is $12416$ $km$, During journey he stays for $15$ $minutes$ at midway.What is the average speed of the car during this periods ?

• A. $32km/h$
• B. $30km/h$
• C. $31km/h$
• D. $29km/h$

Answer 1

The correct option is A $32km/h$

Total travel
$\begin{array}{c}=2\times 60-15\\ =105min\\ =\frac{105}{60}hrs\end{array}$
Average speed
$=\frac{12416-12342}{\frac{105}{60}}=\frac{64\times 60}{105}=32km/hr$