a car travels first 10 km in 20 minutes and another 10 km in 30 minutes what is the average speed of the car in metre per second
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1st 10km
t=20min. = 20×60s=1200
s=10km=10×1000 = 10,000
2nd 10km
t=30min.= 30×60s =1800s
s= 10 km =10 × 1000m = 10,000m
average speed=Total distance /total time
=(10,000+10,000)/(1200+1800) m/s
20,000/3000 m/s
=6.666666666m/s
t=20min. = 20×60s=1200
s=10km=10×1000 = 10,000
2nd 10km
t=30min.= 30×60s =1800s
s= 10 km =10 × 1000m = 10,000m
average speed=Total distance /total time
=(10,000+10,000)/(1200+1800) m/s
20,000/3000 m/s
=6.666666666m/s
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