Question

the two adjacent sides of a rectangle are 3a - b and 6b - a. Find its perimeter.

Answer 1

$\bf\red{Answer}$

$\sf \implies L = 3a - b$

$\sf \implies B = 6b - a$

$\sf Perimeter = 2 ( L + B )$

$\sf = 2 ( 3a - b + 6b - a )$

$\sf = 2 ( 3a - a + 6b - b )$

$\sf = 2 ( 2a + 5b )$

$\sf = 4a + 10b$

$\boxed{\sf Perimeter = 4a + 10b}$

Answer 2

Answer:

The answer is 4a+10b

Perimeter = 2(l+b)

If you multiply you will get the correct answer as shown in the Pic.

Thank You