Answer:
c
Step-by-step explanation:
Area of rectangle b=1/2 area of rectangle a=40/2=20 cm²
Length=8 cm
Width of rectangle b=20/8 =2.5 cm
Answer:
j = 15
Step-by-step explanation:

Answer:
Option B is correct
Step-by-step explanation:
Given:
is the result of the composition
.
Also, 
To find: 
Solution:
Take 
Now check whether
is equal to
or not.
First find 

Also, 
Therefore,

So,
Option B is correct