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29 Nov 2017, 05:11
Kudos
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B
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:
70% (02:31) correct
30%
(02:58)
wrong
based on 54
sessions
History
Date
Time
Result
Not Attempted Yet
A rectangular field of size 10m x 4m as shown in the figure has a walkway of width 0.5m at the center in both directions. If the cost of paving the area other than the walkway is 5$ per sqm what is the total cost incurred?
A. 160.25
B. 166.25
C. 166.00
D. 160.00
E. 162.50
Posted from my mobile device
A. 160.25
B. 166.25
C. 166.00
D. 160.00
E. 162.50
Posted from my mobile device
Attachments
53DDED78-2BA4-4E45-AD8A-6FF7AF7A2319.png [ 5.43 KiB | Viewed 2167 times ]
F39AD14C-5BBC-465C-8EE9-B45EAB0A13CE.png [ 5.43 KiB | Viewed 2171 times ]
22 Oct 2018, 10:57
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Sasindran
First determine the total area of the walkway.
To do this, we'll divide the walkway into 3 rectangles as follows:
Aside: We assigned some nice dimensions that adhere to the conditions provided in the question.
Area of rectangle = (base)(height)
Area of RED rectangle = (10)(0.5) = 5
Area of GREEN rectangle = (1.5)(0.5) = 0.75
Area of BLUE rectangle = (2)(0.5) = 1
TOTAL area of walkway = 5 + 0.75 + 1 = 6.75 square meters
Total area of non-walkway portion = (total area of field) - (total area of walkway)
= (10)(4) - 6.75
= 40 - 6.75
= 33.25
If the cost of paving the area other than the walkway is 5$ per sqm what is the total cost incurred?
Cost = (5)(33.25)
= 166.25
Answer: B
Cheers,
Brent
