Question

alguém akuda porfavorrrrr!!!!​

Answer 1

Resposta:

1) 12,56cm; 2) 15,7cm; 3) 50,24cm; 4) 5cm; 5) 3cm e 6) 4.000 voltas

Explicação passo-a-passo:

1)

C = 2×π×r

C = 2×3,14×2

C = 2 × 6,28

C = 12,56cm

2)

C = 2×π×2,5

C = 2×3,14×2,5

C = 15,7cm

3)

C = 2×π×8

C = 2×3,14×8

C = 50,24cm

4)

C = 2×π×r

31,40 = 2×3,14×r

31,40/2 = 3,14xr

15,7 = 3,14×r

15,7/3,14 = r

5cm = r

5)

C = 2×π×r

18,84 = 2×3,14×r

18,84/2 = 3,14×r

9,42 = 3,14×r

9,42/3,14 = r

3cm = r

d = 2×r

d = 2×3

d = 6

6)

C = 2×3,14×30

C = 188,4cm

7536m = 753.600cm

753600/188,4 = 4.000 voltas