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r = 10 cm (c)
24) 40dm³ = 40.000 cm³
8.000 mm³ = 8 cm³
ttl = 40.008 cm³ (d)
25) 8,2 × 1000/1
= 8200 ltr/dtk (c)
26) 5 ltr = 5 ltr
30 dl = 3 ltr
ttl = 8 ltr (c)
27) 13.00 - 07.00 = 6 jam
lama = 6 × 6 = 36 jam (c)
28) 1¼ jam + 35 mnt - 900 dtk
=( 5/4 × 3600) + (35 × 60) - 900
= 4500 + 2100 - 900
= 6600 - 900 = 5700 (g ad plihan)
29) debit = 1800m³/400mnt
= 4,5 m³/mnt (a)
30) wkt = 1 mnt = 60 dtk
vol = wkt × debit
= 60 × 5
= 300ltr/dtk (c)