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1 m = 100 cm
22/7 x 70 x 70 x 100
1.540.000 cm3 = 1,54 m3 = 1,54 liter
jika air dinyalakan selama 10 menit maka
10 x 20 liter = 200 liter
jika selama seminggu maka
200 x 7 hr = 1400 liter
air di penampungan sudah habis terlebih dahulu dalam bbrp detik karena hanya ada 1,54 liter
4. panjang tali = jari - jari = 14 m
luas lingkaran = phi x r x r
22/7 x 14 x 14
= 616 m2