Question

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 side find the total area of the margin

Answer 1

Oooooo ncert,

Length of painting=8cm
Breadth=5cm
Area of the painting=
=l×b
=8×5
=40cm²

Length of whole cardboard=8cm+1.5cm+1.5cm=11cm

Breadth of whole cardboard=5cm+1.5cm+1.5cm=8cm

Area of the whole cardboard=
=l×b
=11×8
=88cm²

Now, area of the margin =

Area of the whole cardboard- Area if the painting

=88-40
=48cm²






1 picture= Figure for easiness

2 picture= length and breadth of whole cardboard found after calculations