# New streetlights will be installed along a section of the highway. the posts for the streetlights will be 7.5 m tall and made of aluminum. the city can choose to buy the posts shaped like cylinders or the posts shaped like rectangular prisms. the cylindrical posts have a hollow core, with aluminum 2.5 cm thick, and an outer diameter of 53.4 cm. the rectangular-prism posts have a hollow core, with aluminum 2.5 cm thick, and a square base that measures 40 cm on each side. the density of aluminum is 2.7 g/cm3, and the cost of aluminum is \$0.38 per kilogram. if all posts must be the same shape, which post design will cost the town less? how much money will be saved per streetlight post with the less expensive design?

### Another question on Mathematics

Mathematics, 21.06.2019 21:30
An internet company charges \$8.95 per month for the first 3 months that it hosts your web site. then the company charges \$11.95 per month for web hosting. how much money, in dollars, will the company charge for 8 months of web hosting?
Mathematics, 21.06.2019 23:30
What is the measure of angle 1? a.28 b.152 c.168 d.64
Mathematics, 22.06.2019 02:30
Given: lkm jkm, clmk prove: alkmajkm jmk. choose the word that completes the sentence correctly. proof: lkm jkm and lmk * umk are given. km km by the property of congruence. equivalence symmetric reflexive transitive
Mathematics, 22.06.2019 04:00
The length of a rectangle is 2 inches more than twice it’s width. if the perimeter of the rectangle is 70 inches,find it’s length and width