the answer can be in 4 hours it will be have 24 cars parked.in 5 hours that will be 30 cars parked .in 6 hours that will be 36 cars parked.in 7 hours that will be 42 cars parked.in 8 hours that will be 48 cars parked, in 9 hours that can be 54 cars parked,in 10 hours that can be 60 cars parked ,in 11 hours that will be 66 cars parked,in 12 hours that can be 72 cars parked,in 13 hours that can be 78 cars parked,in 14 hours that can be 84 cars parked,in 15 hours that will be 90 cars parked,in 16 hours that will be 96 Cars parked.
