A beats B by 20metres ,B beats C by20 metres in a 100 m race .By how much A beats C  Choose the correct choice:  A) 35metres  B) 36metres  C) 37metres  D) 38metres  E) 39metres
A : B = 100 : 80   B : C = 100 : 80   A : C = (A/B * B/C)   = (100/80 * 100/80)   = (100/64)   Therefore A beats C by = (100-64)= 
<gadget id="calculator">(100-64)</gadget>
<output>36</output>
36metres.   ANSWER:36metres
<result>B</result>
A beats B by 20metres ,B beats C by20 metres in a 100 m race .By how much A beats C