Avg cost of 3 sharpners and 6 erasers is Rs.72. The avg cost of 6 sharpners and 8 erasers is Rs.112. Find the total cost of 20 sharpners and 20 erasers?	Select the correct option
A) 190  B) 160  C) 130  D) 200  E) 180
Avg cost of 3 sharpners and 6 erasers is Rs.72   (3 sharpner + 6 erasers) 9=72   therefore 1 sharpner cost is 72/9= 
<gadget id="calculator">72/9</gadget>
<output>8</output>
8, so 3 sharpner cost is 3x8=24 and 6 erasers cost is 6x8=48   Again, avg cost of 6 sharpners and 8 erasers is Rs.112   (6 sharpner + 8 erasers) 14=112   therefore 1 sharpner cost is 112/14= 
<gadget id="calculator">112/14</gadget>
<output>8</output>
8, so 6 sharpner cost is 6x8=48 and 8 erasers cost is 8x8=64   So 20 sharpner cost is (20/a)=160 and 20 erasers cost is (20x8)=160   ANSWER:160
<result>B</result>
Avg cost of 3 sharpners and 6 erasers is Rs.72. The avg cost of 6 sharpners and 8 erasers is Rs.112. Find the total cost of 20 sharpners and 20 erasers?