Do we use it to find out the cost of anything? Note the correct way to ask a question.
In many cases, quite a lot!!
I bought a car ten years ago. In 2004, it cost £6000. It is now worth about £500.
Many "vintage" or "antique" shops have items for sale which cost over £5000. They are probably worth a tenth of that.
Have you looked up the Hindi words for cost, value and worth? Do they have the same meanings in Hindi?