The ratio of 3.5 Kg to 280 gm is ______?

4:5

25:2

5:4

None of these

First, convert both to the same unit (grams):

3.5 kg = 3500 grams

280 grams (already in grams)

Ratio = 3500 : 280

Simplifying the ratio:

3500 / 280 = 12.5

280 / 280 = 1

12.5 : 1 = 25 : 2 (after multiplying both parts by 2)