An iron of length 20 m weighs 42 kg. The weight of the same bar of length 13 m is :

A uniform iron bar of length7 m weight 22.4 kg. How much does the same bar of length 13 m weight ?

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.

A cube of side length 3cm weighs 12kg .What is the weight of similar cube of same material whose side length is 12cm?

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.

A rope of length 13 1/2 m has been divided into 9 pieces of the same length. What is the length of each piece?