A THIEF WALKS AT A SPEED OF 4Km/hr AND CAN RUN AT A SPEED OF 5m/sec . he walked for some time before he saw a policeman and run away . IF HE COVERED A TOTAL DISTANCE OF 2.5 Km IN 20 MINUTES . FIND OUT HOW MUCH DISTANCE HAD HE WALKED AND IN HOW MUCH TIME BEFORE HE SAW THE POLICEMAN ?
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5 mins walk .15 mins before
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