A cyclist traveled 10

Question

A cyclist traveled 10

 kilometers per hour faster than an in-line skater. In the time it took the cyclist to travel 40

 kilometers, the skater had gone 20

 kilometers. Find the speed of the skater in km/hr

Answer 1

20/s = 40/c

time=time

d/r=d/r

distance over speed for each set equal

20/s = 40/(s+10)

20s + 200 = 40s

20s = 200

s = 10 km/hr= skater speed

in 2 hours the skater goes 2(10) = 20 kilometers

c = 20 km/hr = cyclist speed

in 2 hours the cyclist goes 2(20) = 40 kilometers