Train into a Tunnel

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?




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You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

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There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

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The more you take me, the more you leave me behind.
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Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

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The pound is not a finish.

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