So I'm taking this "math in society" class as my very last required credit so I can graduate this spring (YAY) and we do these riddle type problem solving questions. I'll admit, I'm totally not getting this one so I"m wondering if someone can help me out! I don't want just the answer, I'm looking for an explanation so I know what to look for, so I know how to figure this out. they aren't for credit, theyre just excercises, so I'm not trying to pull a fast one on my teacher lol.
Shrek and Donkee are on an adventure. They are searching for a comb made of rubies. Eventually they reach a lake that is shaped like a square. In the middle of the lake is an island and on the island is the ruby comb. Using a rope with feet markings on it, Shrek and Donkee discover that it is 20 feet from the edge of the lake to the island. (See the figure below.) If there are two wooden planks that are 18 feet long how will Shrek and Donkee retrieve the ruby comb? There is no way to attach the two boards together to make one long board
You can't assume they can swim and they can't walk on the boards because you can't assume the boards will float.
Answer by elizabr at 8:14 PM on Apr. 5, 2011
Answer by vbruno at 7:29 PM on Apr. 5, 2011
Answer by elizabr at 7:35 PM on Apr. 5, 2011
Answer by onethentwins at 7:54 PM on Apr. 5, 2011