Chapter PS, Problem 4.6P

To determine

To find: The time at which Don wake up.

Answer to Problem 4.6P

The time at which Don wake up is $6:25\text{A}\text{.M}\text{.}$

Explanation of Solution

Given information:

Don needs $30\min$ to get dressed, $30\min$ for breakfast, and $5\min$ to walk to the bus stop.

Calculate the total time taken by Don to catch the bus after he wake up,

  $\begin{array}{c}x=30+30+5\\ =65\min \\ =1\text{h}\text{5min}\end{array}$

The time at which Don wake up is calculated as,

  $\begin{array}{c}y=7:30\text{A}.\text{M}\text{.}-1\text{h}\text{5min}\\ =6:25\text{A}\text{.M}\text{.}\end{array}$

Thus, the time at which Don wake up is $6:25\text{A}\text{.M}\text{.}$