Hans stands at the rim of the grand canyon and yodels down the bottom he hears his yodel echo back from the canyon floor 5.20 seconds later .assume that the speed of sound in air is 340.0m/s how deep is the canyon at his location

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?