Aisha S. | Best Tutor For Math and WritingBest Tutor For Math and Writing
This can be treated as a ratio problem. From 3:15 to 3:20 is 5 minutes. Scott printed 12 pages in 5 minutes. That is 12 to 5. You want to know how long it will take Scott to print 15 pages at this rate. Equal the 12 to 5 ratio to 15 to “unknown time” or “t” .
Multiply both sides by 5 and t.
t=6.25 or 6 minutes and 25 seconds
David W. | All Around Patient TutorAll Around Patient Tutor
If you need to know how much longer it will take to finish printing than. you look at it like this; it took 5min to complete 12 pages and he has 3 pages left to print. Therefore 5/12=x/3, then cross multiple to get 12x=15, then get x by itself so divide both sides by 12, x=15/12, so x=1.25min or 1min 15 sec.
Josh B. | Mechanical Engineer Tutoring MathematicsMechanical Engineer Tutoring Mathematics
Any type of ratio problem like this, just cross multiply: You have (12/5) = (15/x). You get 12(x) = 75
x = 6.25 min or 6 min and 15 seconds.
Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.64.6(13 lesson ratings)(13)
In five minutes, he printed 12 pages. At this rate, in how many minutes did he print 15 pages?