Question

a picture is a picture is painted on a cardboard 10 cm long 8 cm wide leaving a margin of 2.5 cm long each of its sides find the total area of the margin

Answer 1

Area of cardboard = length × breadth=10×8 = 80 cm ^2

Area painted = {10-(2.5× 2)} × {8 - (2.5× 2)}

=(10-5 )× (8-5)

= 5×3 = 15 cm^ 2

Answer 2

HEY MATE

$\huge\mathfrak\red{Solution}$

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Area of margin= area of cardboard - area of painting

dimensions of cardboard is 10cm & 8cm

dimensions of picture is (10-5)=5cn & (8-5)=3cm

$area \: of \: margin = (10 \times 8) - (5 \times 3) \\ = 80 - 15 = 65 {cm}^{2}$

$<b><u><I>$

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