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The pupils in my class work very quickly. Jasleen answers four questions every 30 seconds and Ella answers five questions every 40 seconds. Last week, Jasleen took exactly 1 hour to answer a large set of questions. How many minutes more than Jasleen did Ella take to answer the same set of questions? |
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Answer» GIVEN : Jasleen ANSWERS four questions every 30 seconds and Ella answers FIVE questions every 40 seconds. Jasleen took exactly 1 hour to answer a large set of questions. To find : How many minutes more than Jasleen did Ella take to answer the same set of questions Solution: Jasleen answers four questions every 30 seconds => Jasleen answers 8 questions every 1 minutes => Jasleen answers 60 x 8 = 480 questions every 60 minutes = 1hr Ella answers five questions every 40 seconds. => 1 questions in 8 sec => 480 Questions in 480 x 8 SECS = 480 x8 /60 min = 8 * 8 = 64 mins Hence 4 mins more taken by Ellina Learn More: 20 men can complete a piece of work in 15 days. One man starts the ... A work is completed such that on the nth day from the start n men ... |
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