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The diagram shows a plan of Jason’s garden - Edexcel - GCSE Maths - Question 4 - 2022 - Paper 2

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The diagram shows a plan of Jason’s garden. ABCO and DEFO are rectangles. CDO is a right-angled triangle. AFO is a sector of a circle with centre O and angle AOF = 9... show full transcript

Worked Solution & Example Answer:The diagram shows a plan of Jason’s garden - Edexcel - GCSE Maths - Question 4 - 2022 - Paper 2

Step 1

Calculate the area of rectangle ABCO

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Answer

The area of rectangle ABCO can be calculated using the formula:

extArea=extlengthimesextwidth=7extmimes11extm=77extm2 ext{Area} = ext{length} imes ext{width} = 7 ext{ m} imes 11 ext{ m} = 77 ext{ m}^2

Step 2

Calculate the area of rectangle DEFO

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Answer

The area of rectangle DEFO is:

extArea=extlengthimesextwidth=4extmimes9extm=36extm2 ext{Area} = ext{length} imes ext{width} = 4 ext{ m} imes 9 ext{ m} = 36 ext{ m}^2

Step 3

Calculate the area of triangle CDO

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Answer

The area of triangle CDO can be calculated using the formula:

ext{Area} = rac{1}{2} imes ext{base} imes ext{height} = rac{1}{2} imes 7 ext{ m} imes 9 ext{ m} = 31.5 ext{ m}^2

Step 4

Calculate the area of sector AFO

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Answer

The area of sector AFO with radius 7 m and angle 90° is:

ext{Area} = rac{1}{4} imes ext{Area of circle} = rac{1}{4} imes ext{π} imes (7 ext{ m})^2 \ = rac{1}{4} imes ext{π} imes 49 ext{ m}^2 \ \ = 12.25 ext{π} ext{ m}^2 \ \ ext{(approximately 38.48 m}^2\text{ for } ext{π} ext{ around } 3.14)

Step 5

Calculate the total area of the garden

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Answer

The total area of the garden is:

extTotalArea=extAreaABCO+extAreaDEFO+extAreaCDO+extAreaAFO  =77extm2+36extm2+31.5extm2+38.48extm2  =183.98extm2 ext{Total Area} = ext{Area}_{ABCO} + ext{Area}_{DEFO} + ext{Area}_{CDO} + ext{Area}_{AFO} \ \ = 77 ext{ m}^2 + 36 ext{ m}^2 + 31.5 ext{ m}^2 + 38.48 ext{ m}^2 \ \ = 183.98 ext{ m}^2

Step 6

Determine the number of bags needed

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Answer

To determine the number of bags of grass seed needed:

ext{Bags Needed} = rac{ ext{Total Area}}{ ext{Coverage per bag}} = rac{183.98 ext{ m}^2}{14 ext{ m}^2} \ \ ext{Bags Needed} ext{ (rounded up)} = 14

Step 7

Calculate the total cost

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Answer

The total cost for the grass seed is:

extTotalCost=extBagsNeededimesextCostperbag=14imes£10.95=£153.30 ext{Total Cost} = ext{Bags Needed} imes ext{Cost per bag} = 14 imes £10.95 = £153.30

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