Question

i have a doubt in conversion of m to km, litre to cm 3 or m 3 , seconds to minute, minute to hour? plz explain to me properly

Answer 1

Basic units are. This is the arangement,each step is muliplied by 10 to get next step. for eg:  mili*10=centi, centi*10=deci..
mili
centi
deci
unit
deca
hecta
kilo

then for metre to kilometre we have 3 steps so 10*10*10.i.e 1Km=1000m.
1l=1cm^3(it is 1 volume = 1 litre)
for 1 hour, it contains 60 minutes.Hence 1hr=60mins , 2hrs=60*2mins.
1 minute contains 60 seconds hence 2mins=2* 60 seconds

Answer 2

See the pic. I've solved it with help of pic.