A ball dropped from H height and moves 80% of height each time. Total distance covered is Choose the correct choice from the following choices:  A) 4H  B) 5H  C) 7H  D) 9H  E) 8H
First time distance is H   Second time 80H/100=4H/5   similarly third time 80%of 4H/5=H(4^2)/(5^2)   and so on...   this will lead to infinite terms of geometric progression   i.e   H+2*4H/5+2*16H/25............   sum = H+ 2*4H/(5(1-4/5))=9H   ANSWER:9H
<result>D</result>
A ball dropped from H height and moves 80% of height each time. Total distance covered is