Answer: 6/5 or 1 1/5 <--- (SIMPLIFIED)
~hope this helped, have a gr8 day/night my friend!~
Step-by-step explanation:

1 hour = 6 pages
So,
5 hours = 6×5
ㅤㅤㅤㅤ= 30 pages
therefore, She writes 30 pages in 5 hours.
The picture in the attached figure
we know that
volume of the regular pyramid=(1/3)*area of the base*height
area of the base=12*12-----> 144 units²
height=71 units
substitute
volume of the regular pyramid=(1/3)*144*71-----> 3408 units³
the answer is3408 units³