Question

a plane travels between at speed of 915km/h.if the trip takes 2 hours,calculate the distance between the two cities​

Answer 1

x = 4 v

x = (v+15)(4-48/60)

x = 4•v

x = (v+15)•(4-48/60)

4v-x = 0

192v-60x = -2880

v = 60

x = 240