A can run 1 km in 3 min. 10 sec. and B can cover the same distance in 3 min. 20 sec. By what distance can A beat B ? Choose the correct choice
A) 50 m  B) 18 m  C) 96 m  D) 23 m  E) 13 m
Soln:Clearly, A beats B by 10 sec.   Distance covered by B in 10 sec. = (1000 x 10 )/200m = 50 m.   Therefore A beats B by 50 metres.   Option 50 m
<result>A</result>
A can run 1 km in 3 min. 10 sec. and B can cover the same distance in 3 min. 20 sec. By what distance can A beat B ?