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प्रश्न
Mohanrao took 10 days to finish a book, reading 40 pages every day. How many pages must be read in a day to finish it in 8 days?
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उत्तर
Let us suppose Mohanrao will have to read x pages every day to finish the book in 8 days.
As the number of days decreases, the number of pages increases.
So, the number of days and number of pages are in inverse proportion.
∴ 10 × 40 = 8 × x
⇒ x = `400/8`
⇒ x = 50 pages
Hence, Mohanrao will have to read 50 pages every day to finish the book in 8 days
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