1 hour
A sermon can be any length of time as long as you are doctrinally correct.
Many preachers seek the Lord's timing on this as it is His message being proclaimed. You could have a very short sermon and still say a lot, or a long one which has people's complete attention for the entire duration. In general terms, churches such as the Lutheran Church commonly have sermon's about 20 minutes long, and in many Baptist and similar churches are often around an hour in length.
An average couch is about average length
The average length of a vehicle is 17feet
The average length of a ruler is 12 inches.
For adult females, the average step length is about 26 inches and the average stride length is around 52 inches. For adult males, the average step length is 31 inches and the average stride is 62 inches.
The average step length is taken as 30 inches.
The average length of a moose is 2.5 to 2.7 metres.
66 metres is the average length Leon roach
What last sermon where
The average tornado has a path length of 2 to 3 miles.
The average length of a Monopoly game is about 2 to 3 hours.