Question

Help me kakaak..... :)))

Answer 1

27. K = 2πr
K = 2×22/7×7
K = 44 m

Jawaban: B

28. K = 396
2πr = 396
2×22/7×r = 396
44/7×r = 396
r = 396 : 44/7
r = 396 × 7/44
r = 63 m

Jawaban: D

29. K roda = πd
K roda = 22/7×49
K roda = 154 cm

Jarak yang ditempuh
= 154×100
= 15400 cm = 15400:100 m = 154 m 

Jawaban: A

30. L = πr²
L = 22/7×7²
L = 154 m²

Jawaban: A