Divide Rs. 720 between Sunil, Sbhil and Akhil. So that Sunil gets 4/5 of Sohil’ and Akhil’ share together and Sohil gets 2/3 of Akhil’* share.
*Let Akhil' share be Rs. x then**
Their respective shares are Rs.320 Rs.160 and Rs.240.
