Question

a poster of size 20 CM by 16 CM is a pasted on a sheet of cardboard such that there is a margin of 3.5 CM alone each side of the poster. 1) the total area of margin. 2) the cost of the cardboard used at the rate of rupee 1.5 per cmsqure2

Answer 1

area of the poster=16×20 =320 cm²
area of the poster with the margin =23×27 =621 cm²
area of the margin = 621 - 320 = 301 cm²
area of the card board = 621 cm²
total cost = 621 ×15 = 9315 rupees