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Ian and Ada are both training for a marathon. Ian's house is located 20 km north of Ada's house. At 9:00 a.m. one Saturday, Ian leaves his house and jogs south at 8 km/h. At the same time, Ada leaves her house and jogs east at 6 km/h. When are Ian and Ada closest together, given that they both run for 2.5 h? 10:00 am 10:36 am 12:00 pm none of the above

Ian and Ada are both training for a marathon. Ian's house is located 20 km north of Ada's house. At 9:00 a.m. one Saturday, Ian leaves his house and jogs south at 8 km/h. At the same time, Ada leaves her house and jogs east at 6 km/h. When are Ian and Ada closest together, given that they both run for 2.5 h? 10:00 am 10:36 am 12:00 pm none of the above

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Ian and Ada are both training for a marathon. Ian's house is located 20 km north of Ada's house. At 9:00 a.m. one Saturday, Ian leaves his house and jogs south at 8 km/h. At the same time, Ada leaves her house and jogs east at 6 km/h. When are lan and Ada closest together, given that they both run for 2.5 h? 10:00 am 10:36 am 12:00 pm none of the above
Transcribed Image Text:Ian and Ada are both training for a marathon. Ian's house is located 20 km north of Ada's house. At 9:00 a.m. one Saturday, Ian leaves his house and jogs south at 8 km/h. At the same time, Ada leaves her house and jogs east at 6 km/h. When are lan and Ada closest together, given that they both run for 2.5 h? 10:00 am 10:36 am 12:00 pm none of the above
A woman wants to construct a box whose base length is twice the base width. The material to build the top and bottom is $9/m² and the material to build the sides is $6/m². If the woman wants the box to have a volume of 70 m³, determine the dimensions of the box (in metres) that will minimize the cost of production. What is the minimum cost? $328.02 $528.02 $728.02 none of the above
Transcribed Image Text:A woman wants to construct a box whose base length is twice the base width. The material to build the top and bottom is $9/m² and the material to build the sides is $6/m². If the woman wants the box to have a volume of 70 m³, determine the dimensions of the box (in metres) that will minimize the cost of production. What is the minimum cost? $328.02 $528.02 $728.02 none of the above
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