A student must leave for campus in half an hour or he will be late for class.​ Unfortunately, he is snowed in. He can shovel the driveway in 54 minutes, and his brother claims to be able to do it in 27 minutes. If they shovel together, how long will it take to clear the driveway? Will this give enough time for the students to leave for campus?

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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A student must leave for campus in half an hour or he will be late for class.​ Unfortunately, he is snowed in. He can shovel the driveway in 54 minutes, and his brother claims to be able to do it in 27 minutes. If they shovel together, how long will it take to clear the driveway? Will this give enough time for the students to leave for campus? 

 
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