If 10 ships require 10 tanks of oil in 10 days. How long is 1 tank of oil enough for a ship?

If 10 ships require 10 tanks of oil in 10 days. How long is 1 tank of oil enough for a ship? Correct Answer 10 days

time taken by 10 ship to use oil of 10 tanks = 10 day so now , time taken by 10 ship to use 1 tank of oil = 10 / 10 = 1 day then time taken by 1 ship to use oil of 1 tank will be = 1×10 = 10 days ans: 10 days
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