Question

A mirror of length 20cm and width 15cm is to be framed with a 2 cm wide frame . find the area of the frame required . Also find the cost of framing at the rate of 15 per cm2​

Answer 1

Step-by-step explanation:

first find the perimeter of mirror

the perimeter of mirror = 2(l+b)

=2(20 +15)

=2×35

= 70 cm

70 cm is length of mirror.

divide frame into 4 part because of side of mirror.

70 ÷ 4 = 17.5 cm is length of one side of frame

2 cm is width of all side

find area of each side = 17.5 cm ×2 =35cm

find area of all side =35 × 4=140 cm²

cost of frame= 140 cm² × 15 = 2100

cost of frame is 2,100