# How to Calculate the Shortest Time Elapsed on a Stop-Clock

What is the shortest possible time that has elapsed between starting and stopping the stop-clock?

The shortest possible time that has elapsed between starting and stopping the stop-clock is 01:20 (1 minute 20 seconds). To calculate this, we need to subtract the starting time from the stopping time.

## Calculation:

**Step 1:**The stop-clock reads 00:50 when it is started (i.e. 00 minutes 50 seconds).

**Step 2:**It reads 02:10 when it is stopped.

**Step 3:**Subtract the starting time from the stopping time to get the time used:

**02:10 - 00:50 = 01:20**Therefore, the shortest possible time elapsed between starting and stopping the stop-clock is 01:20 (1 minute 20 seconds). This calculation is important in various situations where accurate time measurements are essential, such as in sports, scientific experiments, and daily activities where time management is crucial.