Acertain aircraft can carry a maximum cargo weight of 1300 pounds. if the baggage weighs no more than 210 pounds, what is the limit of the combined weight of the pilot and passengers?

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.