The equation is , where t is the time in seconds and n is the number of people.
Substitute the value of in the original equation.
.
The time is 0.55 seconds.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e82ec2911032a7d60c7b1b9e500e190f.png\")
, where t is the time in seconds and n is the number of people.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2c3a249247ebd07cec5248f77bed1dd8.png\")
in the original equation.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=653e0ccffab699195ad1efd7498fbacf.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cd0d9abcedbc2938529d40924876955b.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6650053ffdaa4c0190be34d24b3b5666.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")