A ball dropped from H height and moves 80% of height each time. Total distance covered is
Choose the correct choice from the following answers:
A) 4 h	B) 5 h	C) 7 h	D) 9 h	E) 8 h

Rationale: first time distance is h second time 80 h / 100 = 4 h / 5 similarly third time 80 % of 4 h / 5 = h ( 4 ^ 2 ) / ( 5 ^ 2 ) and so on . . . this will lead to infinite terms of geometric progression i . e h + 2 * 4 h / 5 + 2 * 16 h / 25 . . . . . . . . . . . . sum = h + 2 * 4 h / ( 5 ( 1 - 4 / 5 ) ) = 9 h answer : d
Answer: D