Jawapan

  • Pengguna Brainly
2016-03-15T22:30:23+08:00
Cm =mm ..

360 x 40=14400
n/s + n'/s' = (n' - n)/R 

1/90 + (4/3)/s' = (4/3 - 1)/60 

s' = -240 cm 
n/s + n'/s' = (n' - n)/R 

(4/3)/40 + 1/s' = (1 - 4/3)/(-60) 

s' = -36 cm 

2016-03-15T22:45:09+08:00
1 cm = 10 mm

40 mm daripada 360 mm

= 40/360

= 1/9