Question

a uniform iton bar of length 7m weighs 22.4kg how much dies the same bar of length 13m weigh

Answer 1

7 m ~ 22.4 kg
13 m ~ x kg

7/13 = 22.4/x
7x = 13 × 22.4
7x = 291.2
x = 291.2 : 7
x = 41.6 kg

Answer 2

First we will divide 22.4kg from 7m.

Then we will got 3.2kg weighs 1m uniform iton bar

After that we have to multiply 3.2kg with 13m

Then we will got 41.6kg which weighs 13 m uniform iton