There are 2 questions, so you guys can choose only one of them if u want.
a) After getting kicked out from his home, Jack goes to his uncle's place. Its 5000km away. He rides a plane, a train and walks to get there. If the flight is 3500km and he walks to get there. How long was the train ride.

b) Lily somehow stole cookies from a jar on the shelf 11 ft above the ground. She can reach 6 ft 5 inches from her ft. How tall a ladder must she use?