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15 Oct 2020, 11:15
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
69% (02:05) correct
31%
(01:44)
wrong
based on 91
sessions
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The cost to maintain a certain type of garden is $10 per 15 square feet for one month. Grace has a garden of this type that measures 2 feet by 30 feet, and Ashley has a garden of this type that measures 40 feet by 6 feet. How much more does Ashley pay than Grace each year to maintain her garden?
A. 120
B. 180
C. 360
D. 720
E. 1440
A. 120
B. 180
C. 360
D. 720
E. 1440
15 Oct 2020, 14:05
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Bunuel
Find the area of each garden and then their costs.
Grace:
→ Area = 2 × 30 = 60 sq ft
→ Cost = 60/15 × $10 = $40 per month
Ashley:
→ Area = 40 × 6 = 240 sq ft
→ Cost = 240/15 × $10 = $160 per month
Therefore, the difference is $120 per month. Over one year, the difference is 12 × $120 = $1440.
15 Oct 2020, 20:37
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The cost to maintain a certain type of garden is $10 per 15 square feet for one month. Grace has a garden of this type that measures 2 feet by 30 feet, and Ashley has a garden of this type that measures 40 feet by 6 feet. How much more does Ashley pay than Grace each year to maintain her garden?
A. 120
B. 180
C. 360
D. 720
E. 1440
Explanation:
Excess area of Ashley's garden than area of Grace's garden=(60*4)-(30*2)=180 sq. feet
Now ,Monthly cost to maintain a certain type of garden=$10/(15 feet) i.e $2/(3 feet) per month
So ,Monthly cost to maintain Excess area of Ashley's garden than area of Grace's garden=180*2/3 =120$/month
thus yearly cost=120*12=$1440
Hence E is the correct answer.
A. 120
B. 180
C. 360
D. 720
E. 1440
Explanation:
Excess area of Ashley's garden than area of Grace's garden=(60*4)-(30*2)=180 sq. feet
Now ,Monthly cost to maintain a certain type of garden=$10/(15 feet) i.e $2/(3 feet) per month
So ,Monthly cost to maintain Excess area of Ashley's garden than area of Grace's garden=180*2/3 =120$/month
thus yearly cost=120*12=$1440
Hence E is the correct answer.
