t1(v1+v2)=112
t=56/60
V1+V2=112/(56/60) ==>>V1+V2=120
112/t+112/(t-0,25)=120
112t+112t-28=120(t^2-0,25t)
120t^2-30t=224t-28
120t^2-254t+28=0
ednoto re6enie otpada za6toto e otrizatelno i ostava pologirelnoto:
t=2h
t2=2-0,25=1.75
V1=112/2=56km/h
V2=112/1,75= 64km/h
P.S. t^2 ozna4ava t na 2ra stepen