A steel ball thrown from 6th floor takes 1 min to reach 5th floor, while a plastic ball takes the stair from 6th floor and reach 1st floor in same time, rubber ball takes the lift and reaches basement in sames time. who will reach on the 4th floor first?

general knowledge math & puzzles

  1. Steel

  2. Rubber

  3. Plastic

  4. All

Show answer
Correct Option: D

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