Answer
$1.56$ $\frac{hours}{day}$ $per$ $adult$
Work Step by Step
The Average amount of hours spent online in a year by an adult is given by : $\frac{93000000000 }{163000000}$ $\frac{hours}{adult}$ $\approx$ $570.552$ $\frac{hours}{adult}$
Since there are approximately 365 days in a year, the average amount of hours spent by an adult per day is given by :
$\frac{570.552 \frac{hours}{adult}}{365}\approx$ $1.563$ $\frac{hours}{day}$ $per$ $adult$
