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प्रश्न
What per cent of 1 day is 1 minute?
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उत्तर
Let x% of 1 day be 1 min.
Then, `x/100 xx 1` day = 1 min
⇒ `x/100 xx 24` h = 1 min ...[∵ 1 day = 24 h and 1 h = 60 min]
⇒ `x/100 xx 1440` min = 1 min
⇒ `x = 100/1440 = 10/144`
∴ x = 0.069%
Hence, 0.069% of 1 day is 1 min.
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