Learning About Seconds

The second is a very small unit used to measure time less than a minute. The face of a clock is a circle divided into 60 equal parts. When the second hand moves one part, it takes one second. This hand moves swiftly. When it completes one round of the clockface, it moves across all 60 parts. This takes 60 seconds. At the same time, the minute hand moves one place, which means that one minute is over. 
Seconds are used on various occasions, such as measuring temperature with a thermometer, measuring heartbeats, or timing a race.
It means that 1 minute is equal to 60 seconds.
Example:

20 minutes and 10 seconds past 7
15 minutes and 40 seconds past 10