1) C = 3.14 × 1 cm
or, C = 3.14 cm
2) C = 2 × 3.14 × 5m
or, C = 3.14 × 10m
or, C = 31.4 m
3) C = 2 × 22/7 × 14 cm
or, C = 28 × 22/7 cm
or, C = 4 × 22 cm
or, C = 88 cm
4) L = 90/360 × 2 × 22/7 × 5 cm
or, L = 1/4 × 10 × 22/7 cm
or, L = 220/28 cm = 55/7 cm
or, L = 7 whole 6/7 cm
Hope you could get an idea from here.
Doubt clarification - use comment section.
