mohon di jawab ya kakak2

22/7 x 3,5 x 3,5 = 38,5 : 1/2 = 19,25 (a)

[tex] \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2} \\ = \frac{22 \times 7}{7 \times 2} \times \frac{7}{2} \\ = 11 \times 3.5 = 38.5[/tex]