The driving distance between Brighton and Hastings is around 60 km. How long will it take Rita for a trip to Hastings and back if she drives at a speed of 80 km/h?

Give your answer as a decimal in hours and also in hours and minutes

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.