fill in the blanks for the results Material A: Crushed Stone Material B: Concret

Question

fill in the blanks for the results

Material A: Crushed Stone Material B: Concrete Sand

Weight of measure filled with 100% Material A = 47.18 lb
Weight of empty measure = 13.47 lb
Weight of 100% Material A = 33.71 lb
  
Total Weight of Material B needed for 75/25 blend =
Weight of measure filled with 75/25 blend = 53.03 lb
Weight of empty measure = 13.47 lb
Weight of 75/25 blend = 39.56 lb
  
Total Weight of Material B needed for 65/35 blend =
Required additional weight of Material B =
Weight of measure filled with 65/35 blend = 55.60 lb
Weight of empty measure = 13.47 lb
Weight of 65/35 blend = 42.13 lb
  
Total Weight of Material B needed for 55/45 blend =
Required additional weight of Material B =
Weight of measure filled with 55/45 blend = 56.40
Weight of empty measure = 13.47
Weight of 55/45 blend = 42.93

NOTE: Assume you’ve weighed up 90 lb of Material A and you want to add enough Material B to get a 60:40 blend. If 60% of the blend is Material A, the blend will weigh 90/0.6 = 150 lb, which means you need to add 150 – 90 = 60 lb of Material B. If you then want a 50:50 blend, the blend will weigh 90/0.5 = 180 lb, which means you need a total of 180 – 90 = 90 lb of Material B, which means you need to add an additional 90 – 60 = 30 lb of Material B.
Lab 3 Data for Homework

Material A: Concrete Sand Material B: Crushed Stone

Weight of measure filled with 100% Material A = 51.25 lb
Weight of empty measure = 13.47 lb
Weight of 100% Material A = 37.78 lb
  
Total Weight of Material B needed for 75/25 blend = lb
Weight of measure filled with 75/25 blend = 54.25 lb
Weight of empty measure = 13.47 lb
Weight of 75/25 blend = 40.78 lb
  
Total Weight of Material B needed for 65/35 blend = lb
Required additional weight of Material B = lb
Weight of measure filled with 65/35 blend = 55.17 lb
Weight of empty measure = 13.47 lb
Weight of 65/35 blend = 41.70 lb
  
Total Weight of Material B needed for 55/45 blend = lb
Required additional weight of Material B = lb
Weight of measure filled with 55/45 blend = 55.87 lb
Weight of empty measure = 13.47 lb
Weight of 55/45 blend = 42.40 lb

NOTE: Assume you’ve weighed up 90 lb of Material A and you want to add enough Material B to get a 60:40 blend. If 60% of the blend is Material A, the blend will weigh 90/0.6 = 150 lb, which means you need to add 150 – 90 = 60 lb of Material B. If you then want a 50:50 blend, the blend will weigh 90/0.5 = 180 lb, which means you need a total of 180 – 90 = 90 lb of Material B, which means you need to add an additional 90 – 60 = 30 lb of Material B.

Explanation / Answer

given

Total Weight of Material B needed for 75/25 blend =
Weight of measure filled with 75/25 blend = 53.03 lb
Weight of empty measure = 13.47 lb
Weight of 75/25 blend = 39.56 lb

Total Weight of Material B needed for 75/25 blend = 0.25*Weight of 75/25 blend = 0.25*39.56 =9.89 lb

Weight of measure filled with 65/35 blend = 55.17 lb
Weight of empty measure = 13.47 lb
Weight of 65/35 blend = 41.70 lb

total Weight of Material B needed for 65/35 blend = 0.35*Weight of 65/35 blend = 0.35* 41.70 lb =14.595lb

Required additional weight of Material B = 14.595-9.89 =4.705 lb

Weight of measure filled with 55/45 blend = 55.87 lb
Weight of empty measure = 13.47 lb
Weight of 55/45 blend = 42.40 lb
  

Total Weight of Material B needed for 55/45 blend = = 0.45*Weight of 55/45 blend = 0.45*42.40 lb =19.08 lb

Required additional weight of Material B = 19.08- 14.595=4.485 lb

thanks

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