Question

Fig. 19.17
A poster of size 12 em by 8 em la pasted on a sheet of cardboard such that there is a margin of
width 1,75 em along each side of the poster. Find
(a) the total area of the margin
(b) the cost of the cardboard used at the rate of 0.80 per sq cm.​

Answer 1

Answer:

Step-by-step explanation:

(a) The area of poster= 12*8= 96 cm^2

Length of the poster along with the margins= 12+ 1.75+1.75=  15.5 cm

Width of the poster along with the margins= 8+1.75+1.75= 11.5 cm

Area of the poster along with margins= 15.5* 11.5= 178.25 cm^2

Area of the margin= 178.25- 96= 82.25cm^2

(b) Rate of the cardboard used= 0.80/cm^2

Cost of the cardboard used= 178.25* 0.80= 142.6