A car moves with a speed of 30 km/h to the power minus 1 for half n hour,25 km/h to the power minus the power-1 for one hour and 40 km/h for two hours. Calculate the average speed of the car.
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given:
v1=30km|/hr
v2=25km/hr
v3=40km/hr
t1=1hr
t2=1hr
t3=2hr
average speed=distance ÷time taken
therefore 30+25+40÷1+1+2=average speed
=95÷4
=average speed =22.75
v1=30km|/hr
v2=25km/hr
v3=40km/hr
t1=1hr
t2=1hr
t3=2hr
average speed=distance ÷time taken
therefore 30+25+40÷1+1+2=average speed
=95÷4
=average speed =22.75
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