Question

George read 15 pages in a book in 12 minutes. At this rate, how long will it take him to finish the book if it has 85 pages?

Answer 1

george will read 85 pages in 1020 minutes

Answer 2

$\frac{15 pages}{12 minutes}$ = $\frac{85 pages}{xminutes}$
THEN do cross - multiplication
15 × x = 12 × 85
15x = 1020
DIVIDE by 15 on BOTH sides 
x = 68 minutes 
OR 
x = 1 hour and 8 minutes