Stir boiling water into dry gelatin mix in large bowl at least 2 min. until completely dissolved. Stir in cold water.
Pour into 13x9-inch pan. Refrigerate 3 hours or until firm.
Cut gelatin into 1/2-inch cubes.
Place in 3-1/2-qt. serving bowl. Cover with layers of cake cubes, half of the whipped topping and the strawberries. Top with remaining whipped topping.
Refrigerate at least 1 hour before serving. Store leftovers in refrigerator.