A thief escaped from a jail and started running at a speed of 10kmph.Half an hour later ,the police started chasing him. If the police brought the thief back to jail in exactly one hour from the moment they started chasing him, then the distance run by the thief before he was caught is ?
Can you tell how much time the police must have taken to catch the thief ?
The thief must have covered 5 km by time police started chasing him. So let's say he covered another x km till the time the police caught him. So now since the police takes 1 hour to catch the thief and bring him back they will cover a distance of 10+2x in 1 hour and in half an hour they will cover 5+x. So the police will catch the thief in half an hour ?
Well, the thief already ran for half an hour before being chased, and was caught 1 hour after chasing, so he went 1 and 1/2 hours, which he can cover 15 km.
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