Question

convert 20km into mm​

Answer 1

Answer:

To convert 20km into mm;

1km = 1000m

1m = 100cm

1cm = 10mm

so, 10 × 100 × 1000 × 20

= 2,00,00,000mm

so, 20km = 2,00,00,000mm

Answer 2

Answer:

2 × 10^7 mm

Explanation:

20 × 1000000 = 20000000