Are you asking how many bags of cement in 1m3 of concrete or how many bags in one m3 of dry cement powder (i.e: a little more than a palette of portland).

The question is actually not so specific. Two possible
thought it meant.
1. If you meant the volume of powder cement to fill 1mmm
then the answere is from 29 to 30 bags.
2. If you meant no of bags to use for a mix to form a 1mmm
concrete, then the answer is nearly 8 bags. The
rest of the volume is for san and gravel.
Maybe it helps. thanks.

Density of cement is 1440kg/cum.
weight of 1 cement bag is 50kgs.
By dividing density by weigt of bag we can get number of
bags per cum.
Thatis 1440/50 = 28.8 bags.
we can do it in other form to.

1bag is equal to 35 litres of water
therefore 1cum =1000litres
total no of bags = 1000/35 =28.8 bags

the volume of 1 cum cement bag is 0.034
so
1/0.034=29.41
or
one bag of cement is 50kg
so
50/0.034=1470
now
1470/50=29.41 that`s approximately equal to 30bags of cement.