Question

Anyone please answer this question with full step by step explanation. Please anyone answer this question with full step by step explanation. Don't post irrelevant answers. Please anyone answer this question with full step by step explanation.​

Answer 1

Answer:

1 cm = 10^6

20 cm = 20000000nm

1 km = 100000cm

20 km = 2000000 cm

Answer 2

1 cm = 10,000,000 nm

20 cm = 20 x 10,000,000

           = 200,000,000nm

1km = 100,000cm

20km = 100,000 x 20

          = 2,000,000cm