Benson played for $$10$$ minutes after reaching home. He watched television for another $$20$$ minutes before taking his lunch. His lunch, which lasted for $$20$$ minutes, was finished at $$2.50$$ pm. At what time did Benson reach home? 
Overseas Competition->Knowledge Point->Counting Modules->Permutations and Combinations->Combinations Overseas Competition->Knowledge Point->Combinatorics->Time Problem->Time Calculation