Question: A rifle bullet loses 1/20th of its velocity in passing through a plank. The least number of such planks required just to stop the bullet is
(A) 5
(B) 10
(C) 11
(D) 20
Answer: Option (C)
Solution:
A rifle bullet loses 1/20th of its velocity in passing through a plank. The least number of such planks required just to stop the bullet is
with
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