A length of a snake is 10 cm and that of a crocodile is 2 m. The ratio of length of the snake to that of the crocodile is
The ratio is a method of comparing two quantities having the same unit, so first convert either meter to a centimetre or vice-versa. 2 m would come out to be 200 cm and hence the ratio of the length of the snake to that of the crocodile would be 10200=120=1:20.