Question

find the area of square park whose perimeter is 90cm

Answer 1

perimeter = 90 cm

let sides of sqare park be a.

perimeter of square park = 90 cm
or, 90 = 4×a
or,90/4 = a
or,a = 22.5 cm

area of square park = a×a
=22.5×22.5
=506.25cm^2

area of sqare park is 506.25 cm ^2 .

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Answer 2

Here is the answer

LET THE SIDE OF SQUARE BE A CM.

PERIMETER OF SQUARE=4 X A

90=4 X A

A=90/4

A=22.5CM

AREA OF SQUARE=(SIDE) X (SIDE)
=22.5 X 22.5
=506.25 sq cm

This is the correct answer.
HOPE IT HELPS.