Sarah paints on a cardboard 25 cm long and 14 cm wide such that there is a margin of 2.5 cm along each of its sides. Find the total area of the margin
Answers
Length of rectangular cardboard = 25cm
Breadth of rectangular cardboard = 14cm
Area of rectangular cardboard = length*breadth
= (25*14)cm²
= 350cm²
Margin along each side = 2.5cm
Length of coloured cardboard = (25-2.5-2.5)cm
= 20cm
Breadth of coloured cardboard = (14-2.5-2.5)cm
= 9cm
Area of coloured cardboard = length*breadth
= (20*9)cm²
= 180cm²
Area of margin = area of rectangular cardboard - area of coloured cardboard
= (350-180)cm²
= 170cm²