Question

It takes 180 ml of fertiliser to treat 36 m² of lawn.

How much fertiliser is needed to treat a lawn of area 40 m²?​

Answer 1

200 ml of fertilizer

Explanation:

Create a proportion where x is the amount of fertilizer needed for an area of 40 m²

`(180)/(36)` =
`(x)/(40)`

Cross multiply and solve for x:

36x = 7200

x = 200

So, 200 ml of fertilizer is needed