Question

Identical uniform bricks of 20 cm in length are stacked so that 4.0 cm of each brick extends beyond the brick below. 
a) How many bricks can be stacked in this way before the pile collapses? 

b) If the bricks in this example are stacked so that alternately, 4.0 cm and 6.0 cm extend beyond the previous brick, how many bricks occur stacking before the pile collapses? 

c) make an outline of the whole problem.

Answer 1