Question

Find the elapsed time Start 5:15am End time 12:04pm

Answer 1

Given that the start time is 5:15 am. It can be represented as,

`S=5\colon15`

Also given that the end time is 12:04 pm. It can be represented as.

`E=12\colon04`

The elapsed time (e) is equal to the difference between the end time and start time as given below,

`e=E-S`

Substitute the values,

`e=12\colon04-5\colon15`

Note that 04 minutes is greater than 15 minutes, so we have to borrow 1 hour from 12 hours and add it to the minutes,

`12\colon04\equiv11\colon64`

Replace the value and perform the subtraction,

`\begin{gathered} e=11\colon64-5\colon15 \\ e=(11-5)\colon(64-15)_{} \\ e=6\colon49 \end{gathered}`

Thus, the required elapsed time is 6:49, that is, 6 hours and 49 minutes.