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Answer: 5 hours
Step-by-step explanation:
Ishwar's speed per hour:
Number of 15 minute periods in an hour:
= 60 /15
= 4 periods
Ishwar reads at 5 pages in 15 minutes so in an hour Ishwar would read:
= 4 * 5
= 20 pages per hour
Annie = 15 pages in an hour.
Ishwar number of hours to read 300 pages:
= 300 / 20
= 15 hours
Annie number of hours to read 300 pages:
= 300 / 15
= 20 hours
Difference = 20 - 15
= 5 hours