Jawabanmu

2014-05-10T05:11:02+07:00
V = lamda/T
20 = 25/T
20T = 25
T = 25/20
T = 5/4 = 1,25

  • Afza
  • Gemar Membantu
2014-05-10T05:12:08+07:00
V = Lambda
      Periode

Periode = Lambda
                  V
Lambda = 25

V = 20

25       25/20 = 1.25 s 
20