Math, asked by ramniwasn959, 1 year ago

Riya pasted a picture that is 40 cm long and 28cm wide in the centre of a cardboard leaving a margin of 1 cm on all side. Find the area of the cardboard uncovered by the picture.​

Answers

Answered by manpreet6634
0

Answer:length of picture = 40cm

Breadth of picture =28cm

Area of picture =l*b

=28cm *40cm=1120cm2

Margin =1120–4

=1116cm2 ANS

Step-by-step explanation:

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Answered by JanviSamantray13
2

Solution :-

Total length of the painting including the margin = 40 cm

Total width of the painting including the margin = 28 cm

Area of the painting including the margin = 40*28 

Area of the painting including the margin = 1120 sq cm

Length of the painting without the margin = 40 - (2 + 2)

= 40 - 4

= 36 cm

Width of the painting without the margin = 28 - (2 + 2) 

= 28 - 4 

= 24 cm

Area of the painting without the margin = 36*24

Area of the painting without the margin = 864 sq cm

Area of the margin = Area of the painting including the margin - Area of the painting without the margin

⇒ 1120 - 864

= 256 sq cm

So, the total area of the margin is 256 square

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