Tolong bantu kk mengunakan cara​

Penjelasan dengan langkah-langkah:

Nomor 39.

= 4 . 7 1/2 ÷ 5

= 4 . 15/2 ÷ 5

= 60/2 ÷ 5/1

= 60/2 x 1/5

= 60/10

= 6 ✓

Nomor 40.

k = 176 cm

d = 176 ÷ 22/7

d = 176 x 7/22

d = 56 cm

r = 56/2 = 28

l = π.r²

= 22/7 . 28 . 28

= 22 . 4 . 28

= 88 . 28

= 2464 m²