Question

A 1-hour driver's test has 100 questions. Mike spends an average of 30 seconds each of the first 60 questions. To finish the test on time, what is the average number of seconds he can spend on each of the remaining questions? Justify your answer.

Answer 1

Answer:

45 secs

Step-by-step explanation:

Mike spent 30s on each of the first 60 questions. In total, he spent 30mins on the first 60 questions (30s per q, 30*60=1800s. 1800s/60=30mins).

Therefore he has a further 30mins left to complete the last 40 questions:

1800s/40=45 seconds