At a local restaurant the health inspector visits every 7 days and the fire inspector every 12 days make a table for the next 4 visits for each inspector and in how many days will both inspectors visit on the same day?

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?