Question

please answer and thoroughly explain the question ( I am more interested in UNDERSTANDING how to solve the question)

A small excavating company owns the following Excavator Tvpe CAT 330CCAT 365B Number of Excavators Bucket Size Excavator Cvcle Time Excavator Cost 2 1.25 с 18 sec 2 0.7 10 sec $215.00/hr $250.00/hr Available Trucks Truck Capacit HDRM 8 18 12 min Truck Cost $90.00/hr Efficiency Hour 50 min CAT 615 CAT 621 Scraper Type Scraper Capacit Scrapers Available 17 cy 2.3 су 10 8 225 00/hr 350 0O/hr Trucks Truck Capacit HDRM Truck Cost 8 18 12 min $90.00/hr Efficiency Hour 50 min CAT 615 CAT 621 Scraper Type Scraper Capacit 17 cy 23 cy Scrapers Available 10 8 Scraper Cost $225.00/hr $350.00/hr 0.3 min 0.6 min 0.7 min 0.4 min 0.7 min 1.0 min Spot Time Load Time Maneuver and Dump Time Haul & Return Time Available Dozers 6 min 5 min Dozer Cost $125.00/hr Efficiency Hour 45 min Additional information: 1 Acre = 43560 ft2 Load Factor = 0.85 $763,723.58 4. A crane can hold 24,000 lbs at a radius of 40 feet. The boom (which is 50 feet long) weighs 8 tons. Give the full crane rating for this crane assuming a minimum radius of 10 feet. Also, what is the maximum load the crane can lift at a radius 15 feet? 60T(10-240) 38.6 Ton:s

Answer 1

ANSWER FOR THE 4TH QUESTION

Solution ) Given that ueight: ω': 8 tons force 29 039 N weight: U 24000 人bs c here 9 accele- to grovits boom 9o も Moment about Cmaimum Value) 640x1039 N-ft.

* fo minimum Tadius o toft Now oment bout o Fos matum Value of P o mai lmat - 60 bons 峞The Value 아、p.fo.^sodius 'n' İsl5 ft P 3.67 tons

* At the minimum Todius of crane 50 u31 ค. P8 toos .. Rating af C ane Po6o tonsn to f