1.

1 toputes the average speed forhis trip to be 20 km h. On his return trip along the same3.Abdul, while driving to school, comute, there is less traffic and the average speed is30 km h. What is the average speed for Abdul's trip?A motorboat starting from reatro4.

Answer»

Let the distance be xdistance while going = dist while returningtime = dist./speedso, time while going = x/20time while coming =x/30total time= x/20+x/30=(3x+2x)/60=5x/60=x/12total dist.= 2xavg. speed = total dist./total speed=2x*12/x=24km/hr

x²/6



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