S1=10m U1=20cm/cek S2=30m t2=1min Uср. -?

Question

S1=10m U1=20cm/cek S2=30m t2=1min Uср. -?

Answer 1

Uср.=S/t

S=S₁+S₂=10m+30m=40m

t₁=S₁/U₁=10m/0,2m/c=50c

t=t₁+t₂=50c+60c=110c

Uср.=40m/210c=0,364m/c