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20 May 2017, 06:33
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
98% (00:34) correct
3%
(00:51)
wrong
based on 120
sessions
History
Date
Time
Result
Not Attempted Yet
If a sprinter takes 30 steps in 9 seconds, how many steps does he take in 54 seconds?#
(A) 130
(B) 170
(C) 173
(D) 180
(E) 200
(A) 130
(B) 170
(C) 173
(D) 180
(E) 200
20 May 2017, 06:45
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Distance varies Directly as time when speed is fixed.
Since D and T are directly related, we can say that
D1/T1 = D2/T2
Substituting, 30/9 = D2/54
This gives D2 = 180
So the sprinter will take 180 steps in 54 seconds. Hence D
(We can also say that since time has become 6 times, distance will also become 6 times.
6*30 = 180)
Since D and T are directly related, we can say that
D1/T1 = D2/T2
Substituting, 30/9 = D2/54
This gives D2 = 180
So the sprinter will take 180 steps in 54 seconds. Hence D
(We can also say that since time has become 6 times, distance will also become 6 times.
6*30 = 180)
21 May 2017, 19:41
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\(\frac{54}{9}=6\)
\(6*30=180\)
Therefore, the correct response is: D
\(6*30=180\)
Therefore, the correct response is: D
