sam and nikki lie 206 km apart. at 8:00 am. sam started driving to nikki's house at 60km/hr. at 10:00 am nikki started driving to sam's house at 82 km/hr. at what time will they be 15 km apart?

Answer 1

let the time driven by Sam be t hrs
let the time driven by Nikki be t-4 hrs

distance covered by Sam is 60t
distance covered by Nikki is 82(t-4)

60t + 15 +82(t-4) = 206
142t = 206 - 15 + 328
142t = 519
t = 3.655 hrs = 3 hrs and 39 minutes

so they will 15 km apart at 8:00 + 3:39
or at 11:39 am

Answer 2

thank you