Question

The area of a rectangle is (7.7682) x (10^4) cm² and the width is (2.42) x (10^2) cm.

Answer 1

$\bf \textit{area of a rectangle}\\\\ A=Lw~~ \begin{cases} L=length\\ w=width\\ --------\\ A=7.7682\times 10^4\\ w=2.42\times 10^2 \end{cases}\implies 7.7682\times 10^4=L(2.42\times 10^2) \\\\\\ \cfrac{7.7682\times 10^4}{2.42\times 10^2}=L\implies \cfrac{77682}{242}=L\implies 321=L\implies 3.21\times 10^2=L$