Answer:
A. Timmy's printer can print 68 pages 3/4 of an hour.
B. Timmy's printer can print 90 pages in 1 hour.
ANSWER:
Printer can print 90 pages in an hour and 67.5 pages in 45 minutes.
SOLUTION:
Given, Timmy's printer can print 18 pages in 12 minutes.
A ) How many pages can it print in 3/4 of an hour?
3/4 th of an hour = 3/4 x 60 minutes = 45 minutes.
So, we need to find how many pages can be printed in 45 minutes.
Let the number of pages be x.
We know that,
12 minutes → 18 pages
45 minutes → x pages
On applying chris cross method, 12 [tex]\times[/tex] x = 45 [tex]\times[/tex] 18
x = [tex]\frac{(45 \times 18)}{12}[/tex]
[tex]= \frac{(45 \times 3)}{2}[/tex]
= [tex]\frac{135}{2}[/tex] = 67.5
So, printer can print 67.5 pages in 45 minutes.
B ) How many pages can it print in an hour?
Let the number of pages be x.
We know that,
12 minutes → 18 pages
60 minutes → x pages
On applying chris cross method, 12 [tex]\times[/tex] x = 60 [tex]\times[/tex] 18
x = [tex]\frac{60 \times 18}{12}[/tex]
x = 5 [tex]\times[/tex] 18 = 90
So, printer can print 90 pages in an hour.
