A thief steels a car at 3p.m. and drives it at 20kmph. The theft is discovered at 4p.m. and the owner sets off in another car at 40 kmph. When will he overtake the thief?
Choose the most appropriate option:
A) 9p.m.	B) 9.30p.m.	C) 5p.m.	D) 6a.m.	E) 10.15 p.m.
Suppose the thief overtakes x hours after 6a.m.   Distance covered by the thief in x hrs = distance covered by the owner in (x-1 hours)   20x = 40(x-1)   20x = 40   x = 2 hrs   Thief is overtaken at 5p.m.   Answer is 5p.m.
<result>C</result>
A thief steels a car at 3p.m. and drives it at 20kmph. The theft is discovered at 4p.m. and the owner sets off in another car at 40 kmph. When will he overtake the thief?