Question

Mr.Anderson drove 168 miles in 3 hours and 30 minutes. He then drove the next 2 hours and 15 minutes at q rate of 5 miles an hour faster then the first rate. How many miles did Mr.Anderson drive during the 5 hours and 45 minutes.

Answer 1

`S_(1) =168 \ mil \\ t_(1) =3,5\ h \\ S_(1) =v_(1) *t_(1) /:t _(1) \\ (S_(1) )/(t_(1) ) =v_(1) \\ (168)/(3,5) =48=v_(1) \\ v_(2) =v_(1) +5=48+5=53 \ mil \ per \ hour \\ t_(2) =2,25 hour \\ S_(2) =v_(2) *t_(2) =53*2,25=119,25 \\ S_(1) +S_(2) =168+119,25=287,25 \ mil`