tolong ya kak pakai cara

[tex]26. \: volume \: = 120 \: liter \\ debit = 5 \: \frac{liter}{meter} \\ \\ waktu \: = \frac{volume}{debit} \\ \\ = \frac{120}{5} \\ \\ = 24 \: menit \: (b) \\ \\ \\ 27. \: p \: = 12.5 \: cm \\ l \: = 8 \: cm \\ \\ l \: = p \times l \\ = 12.5 \times 8 \\ = 100 \: {cm}^{2} (c) \\ \\ 28. \: r = d \div 2 \\ = 42 \div 2 \\ = 21 \: cm \\ \\ l \: = \pi \times {r}^{2} \\ \\ = \frac{22}{7} \times {21}^{2} \\ \\ = \frac{22}{7} \times 441 \\ \\ = 22 \times 63 \\ \\ = 1.386 \: {cm}^{2} (a)[/tex]