If cement, gravel and sand are to be mixed in 7:10:13 and 9 tons of cement is available how many tons of mixture can be produced assuming that sufficient gravel and sand is readily available. Select the correct option.
A) 35 7/8 B) 36 C) 34 2/7 D) 34 5/7 E) 38 4/7
Cement:Gravel:Sand = 7:10:13 --&gt; total of   7+10+13= 
<gadget id="calculator">  7+10+13</gadget>
<output>30</output>
30 parts.   If we use 8 tons of cement, then we'll get 9/7*30= 38 4/7 tons of mixture.   Answer: 38 4/7.
<result>E</result>
If cement, gravel and sand are to be mixed in 7:10:13 and 9 tons of cement is available how many tons of mixture can be produced assuming that sufficient gravel and sand is readily available.