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05 Jun 2018, 21:46
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
92% (02:06) correct
8%
(02:30)
wrong
based on 40
sessions
History
Date
Time
Result
Not Attempted Yet
Leah wants to shrink her photos to fit a computer screen. Her photos currently have a width of 1,024 pixels and a height of 768 pixels. If she reduces the width to 800 pixels, then to what height, in pixels, must she reduce the photos to preserve the same ratio of width to height?
A. 1,066.7
B. 600
C. 576
D. 544
E. 500
A. 1,066.7
B. 600
C. 576
D. 544
E. 500
05 Jun 2018, 21:56
Kudos
Bookmarks
Leah wants to shrink her photos to fit a computer screen. Her photos currently have a width of 1,024 pixels and a height of 768 pixels. If she reduces the width to 800 pixels, then to what height, in pixels, must she reduce the photos to preserve the same ratio of width to height?
A. 1,066.7
B. 600
C. 576
D. 544
E. 500
Let X be the required Height.Therefore, From Question:
1024/768 = 800/X
=> X = (768*800)/1024= 600
B is the answer
A. 1,066.7
B. 600
C. 576
D. 544
E. 500
Let X be the required Height.Therefore, From Question:
1024/768 = 800/X
=> X = (768*800)/1024= 600
B is the answer
05 Jun 2018, 22:32
Kudos
Bookmarks
Bunuel
As exact calculations look hard, we'll first try to approximate.
This is an |Alternative approach.
1024 : 800 is about 1000 : 800 = 10 : 8 = 5 : 4 = 1.2 This is a 20% reduction.
Since 20% of 768 is 0.2 * 768 = about 0.2 * 770 = 77 + 77 = 154, the answer is about 768 - 154 = 614.
So (B) is our answer.
If we want to verify our approximation we can estimate that 24/1000 = 2.5%, meaning that the real result should be about 2.5% lower than what we got. 614 * 2.5% = about 6 + 6 + 3 = 15 and 614 - 15 = about 600 as required.
