Mathematics
Medium
Question
There are 21 poles with a constant distance between each pole. A car takes 30 seconds to reach the 16th pole. How long does it take to reach the last pole?
A
39 seconds
B
40 seconds
✓ Official correct answer
C
39.38 seconds
D
39.5 seconds
Community credibility
Registered members can vote for the answer they believe is correct today and explain why. If the facts change after an election or news event, suggest a new option so others can vote it up.
A
39 seconds
No member explanations yet for this option.
B
40 seconds
No member explanations yet for this option.
C
39.38 seconds
No member explanations yet for this option.
D
39.5 seconds
No member explanations yet for this option.