Question

it takes 10 ships 10 days to use 10 tanks of oil. how many days will, it take one ship to use the tank of oil?

Answer 1

Given that "It takes 10 ships 10 days to use 10 tanks of oil."

That means 1 ship also travels for 10 days.

10 ships use 1 tanks of oil then that means 1 ship uses 1 tank of oil.

In short 1 ship travels for 10 days and uses 1 tank of oil.

question doesn't specifies about how many tanks it is asking for 1 ship.

So if you need to find how many days 1 ship travels in 1 tank then answer will be 10 days.

If you need to find how many days 1 ship travels in total 10 tanks of oil then answer will be 10*10= 100 days.