What you cannot hold but it is yours?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

To tease, King Akbar told his most clever advisor Birbal to give his daughter one thing that she can eat when hungry, drink if she feels thirsty and can burn if she feels cold. King Akbar was shocked when Birbal gave Akbar's daughter one such thing that satisfies all of the above.

What did Birbal give to Akbar's daughter?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

What does this rebus mean?

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