Truck

Truck went for 4 hours and 30 minutes. If truck increase speed by 11 km/h, went same distance in 2 hours.

Calculate this distance.

Correct result:

s =  39.6 km

Solution:

t1=4+30/60=92=4.5 h t2=2 h    v t1=s (v+11) t2=s v 4.5=s (v+11) 2=s  s4.5v=0 s2v=22  s=1985=39.6=1985 km=39.6 km v=445=8.8



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