Question

1. Timmy's printer can print 18 pages in 12

Answer 1

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 2

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 $\times$ x = 45 $\times$ 18

x = $\frac{(45 \times 18)}{12}$

$= \frac{(45 \times 3)}{2}$

= $\frac{135}{2}$ = 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 $\times$ x = 60 $\times$ 18

x = $\frac{60 \times 18}{12}$

x = 5 $\times$ 18  = 90

So, printer can print 90 pages in an hour.