Question

find the area of shadow region​

Answer 1

Step-by-step explanation:

1) l = 15-2 = 13cm

b = 2

area1= l×b = 13×2 = 26

area2 = area1 = 26

area3 = 20×2 = 40

total = area1+area2+area3 = 26+26+40 = 92

2) area of lower rectangle r1 = 11×2 =22

next upper rectangle length = 11-2-2 =7

R2 = 7×2 = 14

next upper rectangle length = 7-2-2 = 3

R3 = 3×2 =6

total = R1+R2+R3 = 22+14+6 = 42

3) left rectangle = 4×1 = 4

right rectangle = 4.5 ×1 = 4.5

middle rectangle length = 2+1+1 = 4

middle rectangle area = 4×3 = 12

total = 4+4.5+12 = 20.5