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An hour-long test has 60 problems. If a student completes 30 problems in 25 minutes, then the required seconds he has taken on average for computing each of the remaining problems is
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- 70 seconds
- 50 seconds
- 40 seconds
- 30 seconds
- 70 seconds
Correct Option: A
From the question,
The student is required to answer 30 questions in 35 minutes.
| ∴ Required average time = |  | × 60 | seconds |  | = 70 seconds | |
| 30 |
