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36) ( 25 × 560 ) ÷ 70
= 14.000 ÷ 70
= 200 buah

37) 21 = 3 × 7
35 = 5 × 7
fpb = 7
jadi setiap byk tetangga = 7

38) 3 = 3
4 = 2²
6 = 2 × 3
kpk = 2² × 3 = 12
berenang lagi = 1 + 12 = 13 desember

39) waktu = 12.00 - 09.00
= 3 jam × 60
= 180 mnt
debit = 5m³ / mnt
volume = w × d
= 180 mnt × 5 m³/mnt
= 900 m³

40) d = 56 dm
r = 28 dm
t = 54 dm
V = π × r² × t
= 22/7 × 28 × 28 × 54
= 133.056 dm³