How to calculate quantity of steel in slab

How to calculate quantity of steel in slab
FOR VEDIO LINK
https://youtu.be/ETk7ffGEPJI

2. •Distributionbarsplacedontopofthemainbar.
MainReinforcementbarsareplacedinshorter
directionandDistributionbarsplacedinlonger
spandirection.
Firstwehaveconvertunitsfoottometers.
Length,33’=10.0584m
Width,30’=9.150m
UsingMainBars12mm(ф)diakeepc/c0.15m
UsingDistributionBars10mm(ф)diakeepc/c0.15m
Tofindnumbersofmainbars=
??????
�/�
+1
10.0584
0.15
+1=68bars

3. howto the of in
Tofindnumbersofdistributionbars=
??????
�/�
+1
9.150
0.15
+1=62bars
Totallengthofmainbar=68×9.150=622.2m
Totallengthofdistributionbar=62×10.0584
=623.62m
Diaofmainbar=12mm
Sothatunitweightof12mmbar=
�
2
162
=
12
2
162
=0.88kg/m
Diaofdistributionbar=10mm
Sothatunitweightof10mmbar=
�
2
162
1??????
2
162
=0.62kg/m

4. Howto calculate the quantityof steelin slab
Total weight of 12mm main bars
= 622.2 m×0.88 kg/m = 547.536 kg/m
2
Total weight of 8mm distribution bars
=623.62 m×0.62 kg/m = 381.655 kg/m
2
Total weight of steel for slab
= 547.536 kg/m
2
+ 381.655 kg/m
2
= 929.191 ≈ 930 kg /m
2