Question

Tolong ya dijawab dgn jalannya.... no 14

Answer 1

1/f = 1/s + 1/s'
1/f = 1/40 + 1/60
1/f = 6+4/240
1/f = 10/240
f    = 24 cm

R =2 f
   = 2 x 24 cm
   = 48 cm  (A)

semoga membantu

Answer 2