Question

Tolong bantu jawab yaa no 6,18,25 beserta caranya makasihh

Answer 1

6.) UKURAN SEBENARNYA =
PANJANG = 4,5 X 600 = 2700 CM = 2700 : 100 = 27 METER
LEBAR     = 3 X 600 = 1800 CM = 1800 : 100 = 18 METER
KELILING SEBENARNYA = 2 X ( P + L )
= 2 X ( 27 + 18 )
= 2 X 45
= 90 METER ( D )
18.) WAKTU = JARAK : KECEPATAN 
= 12 : 15
= 0,8 JAM
= 0,8 X 60 = 48 MENIT
= 06.15 + 00.48
= 07.03 ( C )
25.) LUAS = LUAS 1 - LUAS 2
LUAS 1 = 1/2 X ( A + B ) X T
= 1/2 X ( 24 + 14 ) X 14
= 266
LUAS 2 = 1/2 x π x r²
= 1/2 X 22/7 X 7 X 7
= 77
= 266 - 77
= 189 CM²(C)

Answer 2

6.Keliling pada denah : 2×(4,5+3) = 15 cm
   Skala = 1: 600
   Keliling sbenarnya = Keliling pada denah x Skala
                              = 15×600 = 9000 cm = 90 meter

18.K = 15 km/jam
    J = 12 km
    W.berangkat = 06.15
    W = J:K = 12:15 = 4/5 jam = 48 menit
    W.sampai = 06.15 + 48 menit = 07.03 

25.L.trapesium = [(a+b)×t]×1/2 = [(14+24)×14]×1/2 = 19×14 = 266 cm²
   L.1/2lingkaran = 1/2ײ×t = 1/2 × 22/7 × 49 = 77 cm²
   L.diarsir = L.trapesium - L.1/2lingkaran = 266-77 = 189 cm²