A seismograph records the duration of earthquake tremors. If a tremor starts at $10:14:25\text{ AM}$ and…
A seismograph records the duration of earthquake tremors. If a tremor starts at $10:14:25\text{ AM}$ and ends at $10:15:10\text{ AM}$, for how many seconds did the ground shake?
$35\text{ seconds}$
$45\text{ seconds}$
$60\text{ seconds}$
$85\text{ seconds}$
Solution
The time difference between $10:15:10\text{ AM}$ and $10:14:25\text{ AM}$ is $35\text{ seconds}$ to complete the 14th minute plus $10\text{ seconds}$ into the 15th minute, totaling $45\text{ seconds}$.