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A thief started running from point X at a speed of 20 km/hr, after running for 30 minutes, when he watched the police at the distance of 400 m coming from opposite direction at the speed of 30 km/hr, he turned and started running at 25 km/hr in the same direction as of police. After how much distance from point X police will catch the thief? |
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Answer» GIVEN : A thief started running from point X at a speed of 20 KM/hr, after running for 30 minutes, when he watched the police at the distance of 400 m coming from opposite direction at the speed of 30 km/hr, he turned and started running at 25 km/hr in the same direction as of police. To Find : After how much distance from point X police will catch the thief? Solution: From point X at a speed of 20 km/hr, for 30 minutes Distance from X = 20 * (30/60) = 10 km thief turned and started running at 25 km/hr police man at speed of 30 km/hr Relative speed = 5 km/hr relative distance = 400 m = 0.4 km time = 0.4/5 hr = 0.4 * 12 = 4.8 minutes Distance covered in 4.8 minutes = 25 * 4.8/60 = 2 km Hence Distance form point X = 10 - 2 = 8 km distance from point X police will catch the thief = 8 km Learn More: A thief, after committing a theft RUNS at a uniform speed of 50 m/min ... Distance between thief and police is 400 cm. Police is running ... |
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