A car coveres 30 km at a uniform speed of 9 km per hour. At what speed speed should be run for the next 20 min. So that the average speed comes to 12 km per hour
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Answer:
84 km\h
Explanation:
Total distance travel=30+x
Total time taken =11\3
Avarage speed =12km/h
then solved the value of x=14
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