Problema Solution
imagine that it takes approximately 45 seconds for the confederate army to march 100 yards. at the battle of Gettysburg the union army had 6 inch parrot cannons. if the parrot cannons could fire a cannon ball 800 yards and the confederate army is 2100 yards away how many minutes will the union have to wait for the confederate army to march within range?
Answer provided by our tutors
let
t = the time needed in seconds
the rate of the confederate army is 100/45 yards per second
the distance the confederate army needs to march is 2100 - 800 = 1300 yards
since rate = distance/time => distance = rate*time
(100/45)*t = 1300
by solving we find
t = 585 sec
t = 9 min 45 sec
t = 10 min approximately
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the union will have to wait 9 min 45 sec or approximately 10 mi for the confederate army to march within range.