a square painting is surrounded by a 2.5cm frame. if the total are of the painting plus frame is 3600 sq cm, find the dimensions of the painting.

4 answers

f = frame = 2.5 cm

p = dimension of frame

p + f = dimension of one side of square

Area of a square painting :

A = ( p + f ) ^ 2 = 3600

p + f = sqrt ( 3600 )

p + f = 60

p + 2.5 = 60

p = 60 - 2.5 = 57.5 cm
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Duplicate post. This question has been answered already