A chair of weight 40 N rests on four legs. Each leg has an area of contact with the floor of 10 cm?. What is the pressure on the floor due to the chair?

It's time for santa to deliver his presents. assuming he delivers presents all over the world, he has to travel about 75,000,000 miles. if he travels east to west, he can use the time zones to make christmas day last 31 hours. what speed, in miles per hour, must santa fly to get all of his presents delivered?