question_answer 36)

                  The length and breadth of a rectangular sheet are 16.2 cm and 10.1 cm, respectively. The area of the sheet in appropriate significant figures and error is                 (a) \[164\pm 3\,c{{m}^{2}}\]                       (b) \[163.62\pm 2.6\,\,c{{m}^{2}}\]                 (c) \[163.6\pm 2.6\,c{{m}^{2}}\]                (d)163.62 ± 3 cm2                

Answer:

                  (a) \[A=lb+\left( \frac{\Delta l}{l}+\frac{\Delta l}{b} \right)lb\]                 \[=(164\pm 3)\,c{{m}^{2}}\]