One minute =60 seconds

One degree =3600 seconds

Minutes here refer to angular units.

Angular units are usually expressed in degrees, but there are also units smaller than degrees.

For example, time units are hours, minutes, seconds, milliseconds, etc.

Distance units are kilometers, meters, decimeters, centimeters, millimeters and so on.

Therefore, 1 20' is pronounced as 20 degrees, where 20 is equivalent to one third of 1 degree, which means it is slightly smaller than "1".

You can ask questions if you don't understand. I wish you progress in your study and hope to adopt it!