A car covers 20 km in first 30 minutes of its journey, 10 km in next 15 minutes & 12 km in the last 30 minutes. Calculate the average speed of the train. (2)
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hlo mate here is ur ans......
Let the total distance travelled be x km Then total time taken = x/3/10+ x/3/20+x/3/60 = x/30+x/60+x/180
==>6x+3x+x/180 = 10x/180 = x/18 hrs Then average speed = Total distance travelled/Total time taken
x/x/18 km/hr = 18 km/hr..
hope this helps uh dear :)
pls mark as braimliest.....
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