Respuesta :

hermionehajarah

Step-by-step explanation:

4:3

4+3=7

4x + 3x= 7x

7x is the total sq.cm which is 300

7x= 300

x= 300/7

= 42.8

length= 4x

= 4 × 42.8

= 171.42

breadth= 3x

= 3 × 42.8

= 128.4