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A train travels first 15 km of 60km track with a uniform speed of 20km/hr.What should be the speed of the train to cover the remaining distance of the track so that its average speed is 30km/hr for the entire trip? |
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Answer» Answer: 30km/hr Explanation: LET the SPEED of the train after 15KM be s2 Therefore, s1=60km/hr,s2=? AVERAGE speed =s1+s2/2 30=20+s2/2 60=20+s2 s2=30km/hr MARK IT AS BRAINLIST ANSWER |
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