To find out the speed they needed to drive for the last two hours, we first need to calculate the distance they covered in the first 4 hours.
Speed = 70 km/hr
Time = 4 hours
Distance = Speed x Time
Distance = 70 km/hr x 4 hr
Distance = 280 km
Now, to find out the remaining distance they need to cover, we subtract the distance covered in the first 4 hours from the total distance.
Total distance = 450 km
Remaining distance = 450 km - 280 km
Remaining distance = 170 km
Since they have 2 hours left to cover the remaining distance, we can calculate the speed they need to drive in the last 2 hours.
Speed = Distance / Time
Speed = 170 km / 2 hr
Speed = 85 km/hr
Therefore, Ann and Vincent needed to drive at a speed of 85 km/hr for the last 2 hours to reach the event on time.
Ann and Vincent are driving to an event,
450
kilometers
away. Ann and Vincent drove at a speed of
70
kilometers per hour
for the first
4
hours
. They needed to drive faster for the next
2
hours
to be there on time. At what speed did they have to drive for the last two hours?
1 answer
1 answer