Answers

2016-01-20T18:56:51+08:00
2016-01-20T18:57:58+08:00
It can be ratio.
1 min. : 60 secs. = 18 mins. : n secs.

The product of the means and extremes must be equal. Therefore,
60 (18) = 1n
1080 = n

Therefore, the answer to your question is 1080 secs.
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