1 day = 24 hours
30 days =24*30 hours
=720 hours
so ratio of 30 days to 36 hours =720/36
=20/1
=20:1
3
Agraj Seth answered this
it is easy multiply 30 * 24=720
which can be devided by 36 hours
that is=20 you first answer is 20 and
for the second answer multiplay 15 kg to 1000=15000
and that can be devided by 210g =71.42