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:
so each page requires
of an hour, which is approximately 1.5 minutes.
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:
so each page requires