Question

A picture is painted on a cardboard 15 cm long and 12 cm wide such that there is a margin of 2 cm along each of its sides. Find the total area of the margin

Answer 1

Answer:

total area of margin = 50 sq cm.

Step-by-step explanation:

1) area of cardboard =l×b=15×12=180sq cm.

2) if we draw a margin of 2cm along all the sides of the rectangle we get a new rectangle of length 13 cm and breadth 10 cm, so it's area will be l×b=13×10=130 sq cm.

3) total area of margin = area of cardboard - area of new rectangle

= 180-130=50 sq cm.