Marilyn needs to fertilise her front lawn. It measures 20 metres by 35 metres. Each bag of the fertiliser that she plans to use covers approximately 200m2. How many bags should she buy?
Remember: length X width
20 x 35 = 700m2
20 x 30 = 600
20 x 5 = 100
600 + 100 = 700m2
Each bag has 200m2.
200 x 3 = 600m2, and half of 200 is 100.
So Marilyn needs 3 and 1/2 bags of fertiliser.
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