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5,2 m = 520 cm
15 dm = 150 cm
250 cm = 250 cm
Sisa potongan pak ridwan = 520 cm - (150 cm + 250 cm) = 120
29.)
L Tabung I = 22/7 x 3,5 x 3,5 x 20 = 770
L Tabung II = 22/7 x 10 x 10 x 20 = 2700
Selisih LT II - LT 1 = 2700 - 770 = 1430
34.)
1/4 x 24 = 6 kg
1/2 x 18 = 9 kg
1 x 27 = 27 kg
2 x 30 = 60 kg
5 x 15 = 75 kg
6 kg + 9 kg + 27 kg + 60 kg + 75 kg = 177 kg