A car travels 54 km/h for first 20 sec,36 km/h for next 30 sec and finally 18 km/h for next 10 sec.find its average speed.
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The answer is 118/60
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54km/h= 15m
36km/h= 10m
18km/h= 5m
Average speed= total distance covered/total time taken
= 30/60= 0.5m/s
36km/h= 10m
18km/h= 5m
Average speed= total distance covered/total time taken
= 30/60= 0.5m/s
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