A coder can debug a program in 6 hours. If she takes a 10-minute break every hour, how long will the entire task take including breaks?
Correct answer: B. 6.8 hrs
- A. 6.5 hrs
- B. 6.8 hrs
- C. 6.7 hrs
- D. 7 hrs
Explanation
The coder works for 6 hours and takes a 10-minute break after each of the first 5 hours, resulting in 5 breaks. Each break is 10 minutes, totaling 50 minutes, or approximately 0.83 hours. Adding this to the 6 hours of work gives a total of approximately 6.83 hours. Rounding to the nearest tenth gives 6.8 hours. Thus, the correct answer is 6.8 hours. Options 6.5 and 6.7 underestimate the break times, while 7 hours overestimates the total time.
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