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CHAPTER
13
Graders
1. a.
ℎ𝑟. )(5,280 𝑓𝑡.
𝑚𝑖𝑙𝑒)
(1 𝑝𝑎𝑠𝑠)(9 𝑠𝑞.𝑓𝑡.
𝑠𝑞.𝑦𝑑.)(60 𝑚𝑖𝑛.
ℎ𝑟. )=𝟏𝟒,𝟓𝟐𝟎𝒔𝒒.𝒚𝒅.
𝑠𝑞.𝑦𝑑.)(14,520 𝑠𝑞.𝑦𝑑.
ℎ𝑟. )=𝟏𝟐 𝒉𝒓.
𝐴𝑟𝑒𝑎 𝑃𝑟𝑜𝑑𝑢𝑐𝑡𝑖𝑣𝑖𝑡𝑦= (160 𝑓𝑡.)(9.5 𝑓𝑡.)(50𝑚𝑖𝑛.
(3 𝑝𝑎𝑠𝑠𝑒𝑠)(1.3 𝑚𝑖𝑛.)(12𝑖𝑛.
𝑓𝑡.)(27 𝑐𝑢.𝑓𝑡.
𝑐𝑢.𝑦𝑑.)=𝟒𝟖𝟏𝑪𝑪𝒀
𝒉𝒓.
3. 𝐶𝑦𝑐𝑙𝑒 𝑇𝑖𝑚𝑒= (2)(1,000 𝑓𝑡.)
(2 𝑝𝑎𝑠𝑠𝑒𝑠)(8.9 𝑚𝑖𝑛.)(12𝑖𝑛.
𝑓𝑡.)(27 𝑐𝑢.𝑓𝑡.
𝑐𝑢.𝑦𝑑.)=𝟏,𝟑𝟐𝟔𝑪𝑪𝒀
13 - 2
4.
(463𝐶𝐶𝑌
ℎ𝑟.)= $𝟎.𝟐𝟗
5. a.
ℎ𝑟. )(5,280 𝑓𝑡.
𝑚𝑖𝑙𝑒)
5. b.
𝑚𝑖𝑙𝑒)
𝑇𝑜𝑡𝑎𝑙 𝐶𝑜𝑠𝑡=(2𝑔𝑟𝑎𝑑𝑒𝑠
𝑑𝑎𝑦 )(1ℎ𝑟.
𝑔𝑟𝑎𝑑𝑒) ($134
ℎ𝑟. )=$𝟐𝟔𝟖
6. a.
13 - 3
𝑚𝑖𝑛.𝑝𝑒𝑟 𝑚𝑝ℎ)+(2)(22.5 𝑓𝑡.)()
𝑚𝑖𝑛.𝑝𝑒𝑟 𝑚𝑝ℎ)=
6. a. (continued)
(4 𝑝𝑎𝑠𝑠𝑒𝑠)(7.6 𝑚𝑖𝑛.)(9 𝑠𝑞.𝑓𝑡.
𝑠𝑞.𝑦𝑑.)=𝟐,𝟔𝟑𝟐𝒔𝒒.𝒚𝒅.
6. b.
(2,632 𝑠𝑞.𝑦𝑑.
ℎ𝑟. )=𝟏𝟖.𝟐 𝒉𝒓.
7. The dimensions of the parking lot were inadvertently omitted from the problem. They should
be 900 ft. by 900 ft.
𝐶𝑦𝑐𝑙𝑒 𝑇𝑖𝑚𝑒= (2)(900 𝑓𝑡.)
