Question

A book contains 360 pages which measure 20 CM by 14 cm every page has a blank margin 2.5 CM deep along each short side and to 2 CM deep each long side find the total area available for printing

Answer 1

2.5 ×2 =5 (length )
2×2=4(breath)
20 -5=14
14-4=10
14×10
140cm2 is the available space for printing(for one page)
140×360=50400 cm 2 (available in the whole book)