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Well, you can break this down and solve it in your head by thinking it through like this:

we have 1.54 hours, and we know that an hour is sixty minutes long. Let's look at the individual digits, and multiply them by sixty minutes:

1 * 60 = 60

.5 * 60 = 30

.04 * 60 = .1 * .4 * 60 = .4 * 6 = 2.4

So 1.54 hours is equal to 60 + 30 + 2.4 minutes, or 92.4 minutes.

Now, presumably, you'd want minutes and seconds, rather than fractional minutes. The easiest way to get that .4 minutes into seconds is to realise that .4 is equal to two fifths. A fifth of a minute is 12 seconds. Two fifths then would be 2 * 12, or 24 seconds.

The final answer then is 92 minutes and 24 seconds, or 1 hour, 32 minutes, and 24 seconds.

Q: How Long is 1.54 hours?

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