Neha takes 55 minutes 20 seconds to cover her book with brown paper. The next day she covered her sister books in 1 hour 10 minutes 40 seconds. Whose books took a longer time to cover and by how much?
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Her sister books took a longer time to cover...by 55 minutes 20 seconds
1 hour 10 minutes 40 seconds - 55 minutes 20 seconds = 55 minutes 20 seconds
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