A car moves with a speed of 30km/h for half an hour; 25km/h for 1 hr and 40km/hr for 2 hrs. Find average speed.
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here is your answer...............
The car moves speed =30km/h for half an hour
and, 25km/h for 1" hour
and 40 km for 2 hours
so s¹=30 km s²= 25km s³=40 km
t¹=30/60 t²=60/1 and t³=2 hours
so, average speed = total speed/ time taken
s¹+s²+s³/t¹+t²+t³=30+25+40/210 minutes
95000/210=9500/21m/ s
here is your answer...............
The car moves speed =30km/h for half an hour
and, 25km/h for 1" hour
and 40 km for 2 hours
so s¹=30 km s²= 25km s³=40 km
t¹=30/60 t²=60/1 and t³=2 hours
so, average speed = total speed/ time taken
s¹+s²+s³/t¹+t²+t³=30+25+40/210 minutes
95000/210=9500/21m/ s
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