Grades 11-12 Video Solutions 2012-2012_11-12

Video Transcription

The water level in a port city rose and fell on a certain day, as shown in the figure. For how many hours was the water level above 30 centimeters on that day?  The water level was above 30 centimeters in these two shaded regions of time. The first one lasted for 7 hours, the next one lasted for 6 hours for a total of 13 hours.

Video Summary

The water level in a port city rose and fell on a certain day, as shown in the figure. For how many hours was the water level above 30 centimeters on that day? The water level was above 30 centimeters in these two shaded regions of time. The first one lasted for 7 hours, the next one lasted for 6 hours for a total of 13 hours.