Divya has two planks of wood. One of them is 23 metres less than four times the length of the other one. The two planks put together are 27 metres long. What is the length of the longer plank?

Answer 1

l = 4s - 23

l+ s = 27

l = 27-s

4l = 108-4s

5l = 85

l= 85/5 = 17 meters = longer plank

s = 10 meters = shorter plank