Question

In a pack,there are 5 books, each of thickness 20mm and 5 paper sheets each of thickness 0.016mm . what is the total thickness of the pack.

Answer 1

(5*20) mm + (5*0.016)mm
=100mm+0.080mm
=100.080 mm

Answer 2

Thickness of 5 books=5×20=100 mm
Thickness of 5 paper sheets=5×0.016=0.080mm
Total thickness of stack=100+0.080=100.08  mm