A delivery van makes 3 trips in 6 hours. A second van with 80% the speed is added. Together, trips in 6 hours?
Correct answer: C. 6
- A. 5
- B. 5.5
- C. 6
- D. 6.5
Explanation
To find the combined trips made by both vans, first calculate the speed of the first van, which is 0.5 trips per hour (3 trips/6 hours). The second van, traveling at 80% of this speed, operates at 0.4 trips per hour. Together, their combined speed is 0.9 trips per hour. Over 6 hours, they can complete 0.9 * 6 = 5.4 trips. Rounding to whole trips, only full trips are counted, so they complete 6 trips in 6 hours. Options A and B undervalue the combined speed, while Option D overestimates the vans' efficiency, leading to inaccurate trip counts.
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