Algebra

Hi! everyone today our teacher Mr. Wikaira gave us a word problem and I used f for unknown . You can see my working out below 👇👇

    Question : 

    My working out :

   1 Plank = 1500 mm x 200 mm   f = number of planks needed to build fence

   f = 8000 mm long fence 

   200(width of 1 plank) f = 8000 

   f = 8000 / 200

   f = 40 

   

  So,  Mr. Wikaira will need 40 planks to build his fence.