The photograph given as Fig. 10.7 shows a section of a grille made up of straight and curved iron bars. How would you measure the length of the bars of this section, so that the payment could be made to the contractor?
As the grille is made up of straight and curved iron bars, so the length of the curved bars can be measured with the help of thread first and then can be further measured using a scale. The straight bars can be measured with measuring tape.