A painting 40 cm long and 28 cm wide is painted on a cardboard such that there is a margin of 2 cm along each of its sides. Find the total area of the margin.
Answers
Answered by
5
Answer:
Step-by-step explanation:
l of the painting including margin=40cm
b of the painting including margin=28cm
Area of the painting including margin=l^2+b^2
=(40*40)+(28*28)
=2384cm2
margin=2cm
b of painting excluding margin=(28)-(2+2)=24cm
l of painting excluding margin=(40)-(2+2)=36cm
area of painting excluding margin =24^2+36^2
=576+1296
=1872cm2
area of the margin=area of the painting including margin-area of painting excluding margin
=2384-1872
=512cm2
Answered by
4
Answer:
Area of margin. - l×b = 2 (2 x 40) + 2(2 × 28)
= 2[ 80+ 56]
= 2 × 136
= 272cm^2. Ans.
Similar questions