1. r= 14 cm 2. r= 15 cm 3. r= 21 cm 4. r= 25cm 5. r= 28 cm 6. r= 42 cm 7. r= 50cm 8. r= 77 cm 9. r= 95 cm 10. r= 105cm men

[tex]1. \: \pi {r}^{2} \\ \frac{22}{7} \times {7}^{2} \\ 22 \times 7 = 154 \\ 3. \: \pi {r}^{2} \\ \frac{22}{7} \times {21}^{2} \\ 22 \times 63 = 1386 \\ 5. \: \pi {r}^{2} \\ \frac{22}{7} \times {28}^{2} \\ 22 \times 112 = 2464[/tex]