Question Number 96823 by john santu last updated on 05/Jun/20
Commented by mr W last updated on 05/Jun/20
$$\mathrm{1}\:{cm}\:{means}\:\mathrm{32}−\mathrm{25}=\mathrm{7}\:{cm}^{\mathrm{2}} \\ $$$$\mathrm{8}\:{cm}\:{means}\:{then}\:\mathrm{8}×\mathrm{7}=\mathrm{56}\:{cm}^{\mathrm{2}} \\ $$$${green}\:{area}=\mathrm{56}−\mathrm{25}=\mathrm{31}\:{cm}^{\mathrm{2}} \\ $$
Commented by john santu last updated on 05/Jun/20
$$\mathrm{thank}\:\mathrm{you}\:\mathrm{all} \\ $$
Answered by som(math1967) last updated on 05/Jun/20
$$\mathrm{25}+\mathrm{x}=\mathrm{8y} \\ $$$$\mathrm{32}+\mathrm{x}=\mathrm{9y} \\ $$$$\Rightarrow\mathrm{y}=\mathrm{7}\:\therefore\mathrm{x}=\mathrm{56}−\mathrm{25}=\mathrm{31} \\ $$$$\mathrm{31cm}^{\mathrm{2}} \mathrm{ans} \\ $$
Answered by a.lgnaoui last updated on 05/Jun/20
$${if}\:\:{x}={Area}\:\:{We}\:{have} \\ $$$$\left(\mathrm{32}+{x}\right)/\mathrm{9}=\left(\mathrm{25}+{x}\right)/\mathrm{8}\:{then} \\ $$$$\mathrm{256}+\mathrm{8}{x}=\mathrm{225}+\mathrm{9}{x} \\ $$$${Sow}\:\:\:\:\:{x}=\mathrm{31} \\ $$