Question

Do the ratio 30cm to 4m and 20sec to 6min from the proportion?

Answer 1

yes it forms the proportion 30/400=3/40
20/360=1/18

Answer 2

1m = 100 cm

4m = 400cm

30 cm : 4m = 30 : 400 = 3:40

6mins = 360 sec

20 sec : 6 mins = 20 : 360 = 1:18