Bob is taking his son to look at colleges. The first college they plan to visit is 150 miles from their home. In the first hour they drive at a rate of 60 mph. If they want to reach their destination in 2 1/2 hours. what speed must they average for the remainder of their trip?

Question

jiteshmeghwal9 · Answer

for the first hour they drive at a speed of 60 mph which means the distance covered in first hour is 60 miles.

remaining time =3/2 hr
remaining distance=90 miles

average speed=(total distance traveled/ total time taken)
here total distance must be 90 miles as u have to find the average speed for remaining trip & total time will be 3/2 hr.

directrix · Answer

d = r*t
90 = r * 1.5
Solve for r

@starwarsfan123

dan815 · Answer

90 miles divided by 1 and 1/2 hour.

dan815 · Answer

He travelled 60 miler for the first hour as given 60 mph. Then for the remaining 1 and a 1/2 hour he had yet to travel 90 miles to reach his total destination of 150 miles. So 90/(1.5) = 60 mph

dan815 · Answer

oh lol i just realized there was a much simpler way of doign this quesiton LOLOL

dan815 · Answer

so he went 
60 for 1
then
90 for 1.5

and 90 = 1.5(60)
so
1.5(60) for 1.5(1)
60 for 1
therefore he was already going at the right speed to meet his destination in time haha!

dan815 · Answer

hello anyone here?