A runs twice as fast as B and gives B a start of 60m.How long should the racecourse be so that A and B might reach in the same time?
Choose the correct choice: A) 120 m. B) 80 m. C) 150 m. D) 100 m. E) None of the above
ratio of speeds of a and b is 2:1   b is 60m away from a but we know that a covers 1 meter(2-1) more in every second than b   the time taken for a to cover 60m is   60/1= 
<gadget id="calculator">  60/1</gadget>
<output>60</output>
60m   so the total time taken by a and b to reach=2*60= 
<gadget id="calculator">2*60</gadget>
<output>120</output>
120m   120 m.NSWER:120 m.
<result>A</result>
A runs twice as fast as B and gives B a start of 60m.How long should the racecourse be so that A and B might reach in the same time?