Garnelle has 3 dozen sweets, which is 15 more than what Daniel has. Daniel has 10 more sweets than Dacia. How many sweets does Dacia have?

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.