question_answer 1)

Find the area of a square park whose perimeter is 320 m.

Answer:

                Perimeter of the square\[=\text{4}\times \text{side}\]                 \[\Rightarrow \] \[\text{320 = 4  }\!\!\times\!\!\text{  side = }\frac{\text{320}}{\text{4}}\]                 \[\Rightarrow \] \[\text{= 80 m}\]                 Area of the square \[\text{= side  }\!\!\times\!\!\text{  side}\]                 \[=80\times 80=640\text{0 }{{\text{m}}^{\text{2}}}\].