In a 160 meters race A beats B by 56 m or 7 seconds. A's time over the course is:
Choose the correct choice from the following choices:
A) 22 seconds B) 12 seconds C) 13 seconds D) 18 seconds E) 28 seconds
B runs 56 m in 7 sec.   =&gt; B runs 160 m in 7/56*160= 
<gadget id="calculator">7/56*160</gadget>
<output>20</output>
20 seconds   Since A beats B by 7 seconds, A runs 160 m in (20-7)= 
<gadget id="calculator">(20-7)</gadget>
<output>13</output>
13 seconds   Hence, A's time over the course= 13 seconds   ANSWER:13 seconds
<result>C</result>
In a 160 meters race A beats B by 56 m or 7 seconds. A's time over the course is: