Question

During spring break Robert drove 240 miles to his vacation home. If he drove 60 miles per hour for the first half of the trip and 40 miles per hour for the remaining half, what was his average speed, in miles per hour, for the duration of his trip?

A. 40
B. 44
C. 46
D. 48

Answer 1

48

Explanation:

1st half which is 120 miles, he drove 60mph. He drove for 2 hours

2nd half which is another 120 miles, he drove 40mph. He drove for 3 hours.

240 miles divided by 5 hours is equal to 48