If cement, gravel and sand are to be mixed in 7:10:13 and 5 tons of cement is available how many tons of mixture can be produced assuming that sufficient gravel and sand is readily available. Choose the correct choice from the following choices:  A) 35 7/8  B) 36  C) 34 2/7  D) 21 3/7  E) 34 6/7
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 5/7*30=21 3/7 tons of mixture.   Answer: 21 3/7.
<result>D</result>
If cement, gravel and sand are to be mixed in 7:10:13 and 5 tons of cement is available how many tons of mixture can be produced assuming that sufficient gravel and sand is readily available.