Distance between thief and police is 400 cm. Police is running towards the thief with the speed of 80km/hr while the thief is running at a speed of 60 km/hr. If the police start 30 mins after the thief, after what distance will the police the catch the thief?
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Answer:
121.6 km
Step-by-step explanation:
Distance between thief and police is 400 m = 0.4 km ( i believe cm is written by mistake)
Police started after 30 min
Distance = Speed * Time
Distance covered by thief in 30 mins = 60 * (30/60) = 30 km
Thief is ahead by 30 + 0.4 = 30.4 km when police started
Relative Speed of Police = 80 - 60 = 20 km/hr
Relative Distance to be covered by police = 30.4 km
Time Taken by police = 30.4 /20 = 1.52 Hrs
Distance covered by police in 1.52 hrs = 80 * 1.52 = 121.6 km
if we take 400 cm = 400 m
time by police = 1.5002 hrs
then Distance would be 120.016 km
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