In a 100 m race,A covers the distance in 36 seconds and B in 45 second.In this race A beats B by :	Choose the correct answer
A) 20 m B) 25 m C) 22.5 m D) 9 m E) None of these
Solution   Distance covered by B in 9 sec. = (100/45x9)m =20m.   ∴ A beats B by 20 metres.   20 mnswer 20 m
<result>A</result>
In a 100 m race,A covers the distance in 36 seconds and B in 45 second.In this race A beats B by :