If `1 cm^3`' of cast iron weighs 21 g, find the weight of a cast iron pipe of length 1 m with a bore of 3 cm in which the thickness of the metal is 1 cm.

If 1 cm^(3) of cast iron weights 21g, find the weight of a cast iron pipe of length 1m with a bore of 3 cm in which the thickness of the metal is 1cm.

30cm^(3) of iron weighs 234g. Find its density in kg m^(-3) .

Find the weight of solid rectangular iron piece of size 50cm xx40cmx10cm, if 1cm^(3) of iron weighs 8gm.

Find the weight of a lead pipe 3.5m long, if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1 cubic cm of lead weighs 11gm.

Find the weight of a lead pipe 3.5m long, if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1 cubic cm of lead weighs 11 gm.

Find the weight of a lead pipe 3.5m long, if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1 cubic cm of lead weighs 11 gm.

Find the weight of a lead pipe 3.5m long,if the external diameter of the pipe is 2.4cm and the thickness of the lead is 2mm and 1 cubic cm of lead weighs 11gm.

The external diameter of a lead pipe is 2.4 cm and the thickness of the lead is 2 mm. Find the weight of a pipe of length 7m, it being given that 1 cu cm of lead weight 10g

How many cubic cm of iron is required to construct open box whose external dimensions are 36 cm 25 cm and 16.5 cm provided the thickness of the iron is 1.5 cm lf one cubic cm of iron weights 7.5 gm then find the weight of the box.