A thief is spotted by a policeman from a distance of 100metres. When the policeman starts the chase, the thief also starts running. If the speed of the thief be 8km/hr and that of the policeman 10km/hr, how far the thief will have run before he is overtaken ?
Choose the most appropriate option:  A) 400m  B) 1km  C) 500m  D) 450m  E) 650m
Relative speed of the policeman = 10-8= 
<gadget id="calculator">10-8</gadget>
<output>2</output>
2 km/hr   time taken by policeman to cover 100m= (100/1000)*(1/2) = 1/20 hr   In 1/20 hr the thief covers a distance of 8/20 km = 2/5 km = 400m   400mnswer is 400m
<result>A</result>
A thief is spotted by a policeman from a distance of 100metres. When the policeman starts the chase, the thief also starts running. If the speed of the thief be 8km/hr and that of the policeman 10km/hr, how far the thief will have run before he is overtaken ?