A drone takes 1 hour to deliver a parcel. Due to battery issues, its speed reduces by 20%. How long for delivery now?
Correct answer: C. 1.25 hrs
- A. 1.1 hrs
- B. 1.2 hrs
- C. 1.25 hrs
- D. 1.5 hrs
Explanation
Initially, the drone takes 1 hour to deliver a parcel. With a 20% reduction in speed, the drone now operates at 80% of its original speed. Since time is inversely proportional to speed, the new time taken is calculated as 1/(0.8) = 1.25 hours, making Option C correct. Option A underestimates the time increase, Option B uses an incorrect factor, and Option D overestimates the time increase.
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Logical problems present several conditions about people, objects, events or choices and require their possible arrangements to be tested. They cover constraint-based reasoning, rankings, matching, grouping, scheduling and elimination, with attention to the difference between a complete solution and a possibility that merely satisfies one condition.
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