Question

PLEASE ANSWER THE QUESTION. I HAVE A NAPLAN TEST TOMORROW

Answer 1

20 Kg

Explanation:

let b represent the weight of 1 bag of sand

after using
`(1)/(4)` of 1 bag there is
`(3)/(4)` bag left along with the unused bag , then

`(3)/(4)` b + b = 35 ( multiply through by 4 to clear the fraction )

3b + 4b = 140

7b = 140 ( divide both sides by 7 )

b = 20

that is one full bag weighs 20 Kg