Question

If 1000 copies ofa book of 13 sheets require 26 reams of paper, then how many reams of paper is required for 5000 copies of a book of 17 sheets

Answer 1

given 1000 copies -------- 13 sheets ------- 26 reams
          5000 copies -------- 17 sheets -------- x reams
then it would become
             1000 ------ 13
              5000 ------ 17
for 1000 copies, 13 sheets = 13000
for 5000 copies, 17 sheets = 85000
and
for 13000 paper, it takes 26 reams
for 85000, let it would be x
then,
13000 ----- 26
85000 ---- x [ by cross multiply we can get the value of x]
[85000/13000] × 26 = x
85/13× 26 = x
x = 85 × 2
x = 170 reams