1. (a) \( \frac{3}{10} \) of 100 is 30, and \( \frac{7}{10} \) is 70. So, in the ratio 3:7, it's 30:70.
(b) \( \frac{6}{17} \) of 85 is approximately 30, and \( \frac{11}{17} \) is approximately 55.
(c) \( \frac{4}{9} \) of 450 g is 200 g, and \( \frac{5}{9} \) is 250 g.
(d) \( \frac{4}{11} \) of 6655 is approximately 2400, and \( \frac{7}{11} \) is approximately 4255.
(e) \( \frac{3}{8} \) of 7200 g is 2700 g, and \( \frac{5}{8} \) is 4500 g.
(f) \( \frac{1}{6} \) of 2400 ml is 400 ml, and \( \frac{5}{6} \) is 2000 ml.
2. Divide 4000 in the ratio 9:11. \( \frac{9}{20} \) of 4000 is 1800, and \( \frac{11}{20} \) is 2200.
3. Divide 65,000 in the ratio 5:8. \( \frac{5}{13} \) of 65,000 is approximately 25,000, and \( \frac{8}{13} \) is approximately 40,000.
4. A line segment of 48 cm divided in the ratio 5:7. \( \frac{5}{12} \) of 48 cm is 20 cm, and \( \frac{7}{12} \) is 28 cm.
5. Divide 40.5 kg of wheat in the ratio 8:7. \( \frac{8}{15} \) is approximately 21 kg, and \( \frac{7}{15} \) is approximately 18.5 kg.