a painting 40 cm long and 28 cm wide is painted on a cardboard such that there is a margin of 2cm along each of its sides. find the total area of the margin
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Step-by-step explanation:
length of painted on a cardboard=40cm
breadth of painted on a cardboard=28cm
area =?
=l×b
=40×28=1120
area =1120cm²
length of total cardboard=40+4=44cm
breadth of total cardboard=28+4=32cm
area =?
=l×b
=44×32=1408.
area of total cardboard=1408cm²
area of margin=area of total cardboard-area of painted cardboard
=1408-1120=198
therefore- area of margin=198cm²
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