9 workers take = 92 horus
1 worker will take = 92*9 = 828 hours
5 workers will take = 828 /8
= 165.6 hours
Frequently asked questions (FAQs)
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Question: In a right triangle, if the angle of elevation to the top of a tree is 45 degrees and the distance from the observer to the base of the tree is 20 meters, find the height of the tree.