A rod of length 30 feet is broken into two pieces. The longer rod is 12 feet longer than the shorter one. What is the length of the shorter rod?	Choose the correct choice: A) 15 B) 12 C) 8 D) 9 E) 16
Since, 30 is the total length. Smaller is any one from answers.   Try Back solving from Middle answer, i.e. 8. 8+(8+12) = 28 &lt; 30   Hence, Select next bigger no. : 9 +(9+12)= 
<gadget id="calculator">9 +(9+12)</gadget>
<output>30</output>
30. So, 9 is the answer   Answer is 9
<result>D</result>
A rod of length 30 feet is broken into two pieces. The longer rod is 12 feet longer than the shorter one. What is the length of the shorter rod?