.
Minute hand makes 360 degrees in one hour (each hour). Hence, at 3:20 the minute hand is in position 120 degrees,
counting from its position "vertically up" at 3:00.
The hour hang makes
= 30 degrees each hour. Hence, at 3:20 the hour hand is in position 3*30 +
= 100 degrees
counting from its position "vertically up"
Hence, the angle between the two clock hands is 120 - 100 = 20 degrees.