a) there are 3 times 1/3 in each hour: so we have to multiply the original number by 3: 3*13=39!!
b)
so, 13 pages in 1/3 of an hour
for this we have to divide the time needed for the 13 pages by 13:
[tex] \frac{1}{3*13} = \frac{1}{39} [/tex]
so each page requires [tex] \frac{1}{39} [/tex] of an hour, which is approximately 1.5 minutes.
