Jawaban:

1.) dik : s = 1 : 500

pd (panjang denah) = 12,5cm

ld (lebar denah) = 8cm

dit: a. ukuran sbnrny

b. luas denah : luas sbnrny

jwb:

ps = pd : s

ps = 12,5 : 1/500

ps = 12,5 × 500

ps = 6.250

panjang sbnrny = 6.250cm

ls = ld : s

ls = 8 : 1/500

ls = 8 × 500

ls = 4.000

lebar sbnrny = 4.000cm

a. ukuran sbnrny = ps × ls = 6.250 × 4.000 (cm)

b. luas denah = p × l

= 12,5 × 8

= 100

luas denah = 100cm²

luas sbnrny = p × l

= 6.250 × 4.000

= 25.000.000

luas denah : luas sbnrny

= 100 : 25.000.000

= 1 : 250.000

2.) dik: pd = 60cm

ld = 45cm

s = 1 : 800

dit: a. panjang sbnrny

b. lebar sbnrny

c. luas denah

d. luas sbnrny

jwb:

ps = pd : s

ps = 60 : 1/800

ps = 60 × 800

ps = 48.000

(a.) panjang sbnrny = 48.000cm

ls = ld : s

ls = 45 : 1/800

ls = 45 × 800

ls = 36.000

(b.) lebar sbnrny = 36.000cm

c. luas denah = p × l

= 60 × 45

= 2.700

luas denah = 2.700cm²

d. luas sbnrny = p × l

= 48.000 × 36.000

= 1.728.000.000cm²

semoga membantu:)