A courier company has to deliver 400 packages. If each van delivers 20/hour and 5 vans work together, how long to complete?
Correct answer: C. 5 hrs
- A. 3 hrs
- B. 4 hrs
- C. 5 hrs
- D. 6 hrs
Explanation
To find out how long it takes to deliver 400 packages, first calculate the total delivery rate of the 5 vans working together. Each van delivers 20 packages per hour, so 5 vans deliver 20 × 5 = 100 packages per hour. To deliver 400 packages, you divide the total packages by the rate: 400 ÷ 100 = 4 hours. The calculation shows that in 4 hours, 400 packages are delivered. Therefore, option B is correct. Options A and D result in incorrect total package counts, and option D exceeds the required delivery time.
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