Arun can complete a work in 10 days, Rahul can complete the same work in 20 days and Deepak in 40 days. Arun starts working on the first day, Rahul works for the second day and Deepak works for the third day. Again Arun works for fourth day and Rahul for fifth day and so on. If they continued working in the same way, in how many days will the work be completed? अरुण एक काम को 10 दिन में कर सकता है, राहुल उसी काम को 20 दिनों में कर सकता है और दीपक इसे 40 दिनों में कर सकता है। अरुण पहले दिन काम करता है, राहुल दुसरे दिन काम कर सकता है और दीपक तीसरे दिन काम करता है| पुनः अरुण चौथे दिन काम कर सकता है और राहुल पांचवे दिन काम करता है और इसी तरह से प्रक्रिया चलती रहती है। यदि वे इस तरह से काम करना जारी रखते हैं, तो कितने समय में काम समाप्त हो जाएगा?
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