The diagram shows a lawn with a fence along one edge 12m 17m 20m one can of weedkiller can cover 100 square metre each can cost
£19.75
work out the total cost of cans of weedkiller needed to cober the lawn you must show some working
work out the total cost of cans of weedkiller needed to cober the lawn you must show some working
1 answer:
Answer:
59.25 euros
Step-by-step explanation:
The figure that is formed is the following with the respective measurements, now to calculate the area we need the height, for Pythagoras we have:
17 ^ 2 = h ^ 2 + 8 ^ 2
h ^ 2 = 289 - 64
h ^ 2 = 225
h = 15
now the figure area is as follows:
A = h * (b + a) / 2
b long side 20 m and short side 12 cm, replacing:
A = 15 * (12 + 20) / 2
A = 240 m ^ 2
We are told that each can of weedkiller can cover up to 100m ^ 2
Thus:
240/100 = 2.4, so you would need 3 cans of weedkiller
each can costs 19.75, which means that the total cost is:
19.75 * 3 = 59.25 euros
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