Problema Solution
At 12:15pm Helen leaves Norseman to drive to Eucla, a distance of 700km.If she arrives at her destination at 9:00pm that night, what was her average speed?
Answer provided by our tutors
let
d = 700 km the distance
t = 8 hr 45 min = 8.75 hr (from 12:15 pm till 9:15 pm there are 9 hours - 15 min = 8 hours 45 minutes)
v = average speed
the average speed = distance/time
v = d/t
v = 700/8.75
v = 80 km/gr
Helen's average speed is 80 km/hr.