A pilotless cargo carrier brings water, air and dry food to a space station. A third of the cargo's weight is water and the ratio, by weight, of air to dry food is 2:3. If the cargo contains 1,800 pounds of water, how many pounds of air does it contain?	Choose the correct choice from the following answers
A) 1,200 B) 1,300 C) 1,440 D) 3,000 E) 3,240
Let the capacity of the cargo be x   W + A + D = X   Given X/3 = W =&gt; X = 3*1800= 
<gadget id="calculator">3*1800</gadget>
<output>5_400</output>
5400   Now W+A+D= 5400   Now A+D = 5400 - 1800= 
<gadget id="calculator">5400 - 1800</gadget>
<output>3_600</output>
&gt; 3600   Given A/D= 2/3   Now air will  2/5*3600= 
<gadget id="calculator"> 2/5*3600</gadget>
<output>1_440</output>
&gt;1440.   ANSWER:1,440
<result>C</result>
A pilotless cargo carrier brings water, air and dry food to a space station. A third of the cargo's weight is water and the ratio, by weight, of air to dry food is 2:3. If the cargo contains 1,800 pounds of water, how many pounds of air does it contain?