Question

DRT problem

A bicyclist travels 20 miles per hour faster than a walker. The cyclist traveled 25 miles in the time it took the walker to walk 5 miles. Find their speeds.
let speed of walker be x mph
then speed of biker is x+20
so 25/(x+20) = 5/x

cross-multiply and solve for x
(you should get x = 5)

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