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Q: The ratio of sand to gravel in a mixture is 17 : 8 while that between gravel and cement is 6 : 17. What is the ratio of sand to cement in the mixture?
  • A. 17 : 17
  • B. 289 : 48
  • C. 8 : 6
  • D. 3 : 4
Correct Answer: Option D - Sand : Gravel = 17:8, Gravel : Cement=6 : 17 Sand : Gravel : Cement = 102 : 48 : 136 Then ratio of Sand and Cement in the mixture = 102 : 136 = 3 : 4
D. Sand : Gravel = 17:8, Gravel : Cement=6 : 17 Sand : Gravel : Cement = 102 : 48 : 136 Then ratio of Sand and Cement in the mixture = 102 : 136 = 3 : 4

Explanations:

Sand : Gravel = 17:8, Gravel : Cement=6 : 17 Sand : Gravel : Cement = 102 : 48 : 136 Then ratio of Sand and Cement in the mixture = 102 : 136 = 3 : 4