A motorist travels 100 miles. The first half of the distance takes one hour; the second half takes 1.5 hours. What is the average speed for the journey?

I got the answer as 40 miles/hr, am I correct?

Thanks.

rate = d/T = 100/(1+1.5) =

To find the average speed, we need to calculate the total time taken for the journey and divide it by the total distance traveled.

For the first half of the distance:
Distance = 100 miles / 2 = 50 miles
Time taken = 1 hour

For the second half of the distance:
Distance = 100 miles / 2 = 50 miles
Time taken = 1.5 hours

Total distance traveled = 100 miles
Total time taken = 1 hour + 1.5 hours = 2.5 hours

Now, divide the total distance by the total time to get the average speed:
Average Speed = Total Distance / Total Time
Average Speed = 100 miles / 2.5 hours
Average Speed = 40 miles/hr

So your answer of 40 miles/hr is correct. The average speed for the journey is 40 miles/hr.