81. My father is three times as old as my sister, who is twice as old as my brother, who is twice as old as our nephew. The total of all ages is divisible by five and less than 100. How old is my father?
82. Kevin treated his girlfriend to a bus ride, but because of his limited resources they had to walk back. Now, if the bus goes at an average speed of 9 miles per hour and they can walk back at the rate of three miles per hour, how far did they ride so that they made it back in eight hours?
86. Two ferries start at the same time from opposite sides of a river, traveling across the water on routes at right angles to the shores. Each boat travels at a constant speed, though their two speeds are different. They pass at a point 720 yards from the nearer shore. Both boats remain at their slips for 10 minutes before starting back. On the return trips, they meet 400 yards form the other shore. How wide is the river?
88. A man left a legacy of $10,000 to three relatives and their wives. Together, the wives received $3960. June received $100 more than Camille, and Martha received $100 more than June. Jack Smith was given just as much as his wife, Horace Saunders got half as much again as his wife, and Terry Connors received twice as much as his wife. What was the first name of each man's wife?