A particle was at rest from 1 a.m. it moved at a uniform speed 50 km/hr from 1:30 a.m. to 2:00 a.m. find the average speed between -1:15 a.m. to 2:00 a.m.
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Explanation:
Anna traveled distance in 2 hours 15 minutes with speed 80 km\hr=80×
4
9
=180
Then distance remaining =350-180=170 km
The remaining distance cover 60 km \hr then time taken=
60
170
=2.50 hours
Then the time reach =5.20+2.50+2.15=10.25 am
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