Worker $$A$$ can lay railway tracks between two given stations in $$15$$ days and worker $$B$$ can do the same job in $$20$$ days. They work on it together for $$2$$ days and then worker $$B$$ has to leave due to a family emergency. In how many days can worker $$A$$ finish the remaining job? 
Overseas Competition->Knowledge Point->Word Problem Modules->Work Word Problems->Collaborative Work Word Problems