Question

A photo of size 20 em by 16 cm is pasted on a sheet of cardboard such that there is a margin of 7 cm
all around it. Find the
(1) total area of the margin
(2) cost of the cardboard used at the rate of 1.20 ​

Answer 1

Answer:

1) 301 sq cm

2) Rs. 745.20

Step-by-step explanation:

length of photo = 20 cm

breadth of photo = 16 cm

area of photo = 20 × 16 = 320 sq cm

length of cardboard = 20 + 7 = 27

breadth of cardboard = 16 + 7 = 23

area of cardboard = 27 × 23 = 621 sq cm

area of margin = area of cardboard - area of photo

621 - 320 = 301 sq cm

cost of cardboard at rate of Rs. 1.20/sq cm

621 × 1.20 = 745.20

hope you get your answer