If a:b = 3:2, what is (a+b)/(a−b)?
A$5$
B$1$
C$6$
D$2.5$
Answer & Solution
Correct answer: A. $5$
By componendo and dividendo: if a/b = 3/2, then (a+b)/(a−b) = (3+2)/(3−2) = 5/1 = 5.
Related questions
Those two workers, at that combined rate, finish the whole job in:A worker finishing in 5 hours and another in 20 hours together do what share of the job eaConverting two fifths of an hour into minutes gives:In work problems, the parts of the job done by each worker in one hour add up to:Flying into that same 30 mph wind, the same plane's ground speed would be:A plane's ground speed with a tailwind of 30 mph, if the plane itself flies at 150 mph, isOn that drive, Tony's interstate speed was:Tony drives 4 hours in all, 208 miles on the interstate and 40 on country roads, going 15