A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides. Find the total area of the margin
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slove it by l into b......
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Answer:
Length of the cardboard= 8 cm
breadth of the cardboard= 5 cm
Area of the cardboard = l × b
= 8 cm × 5 cm = 40 cm^2
Width of the margin = 1.5 cm
Length of the picture = 8 cm – (1.5 +1.5)cm
= 8 cm – 3 cm = 5 cm
Breadth of the picture = 5 cm – (1.5 +1.5)cm
= 5 cm – 3 cm = 2 cm
Area of the picture = l × b
= 5 cm × 2 cm = 10 cm^2
Area of the margin =Area of the cardboard-Area of the picture
= 40 cm^2 – 10 cm^2 = 30 cm^2
Hence, the required area = 30 cm^2
.
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