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11 Feb 2025, 07:01
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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:
65%
(hard)
Question Stats:
56% (01:27) correct
44%
(01:26)
wrong
based on 282
sessions
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How long does it take for Ben to travel from his home to office on Friday?
(1) Ben’s average speed on his commute to work this Friday was 20 miles per hour.
(2) If Ben’s average speed on his commute to work this Friday had been twice as fast, his trip would have been 1 hour shorter.
(1) Ben’s average speed on his commute to work this Friday was 20 miles per hour.
(2) If Ben’s average speed on his commute to work this Friday had been twice as fast, his trip would have been 1 hour shorter.
11 Feb 2025, 10:30
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hr1212
We know \(\frac{d}{s}= \) t...(i)
d= distance
s= average speed
t= time taken
(1) Ben’s average speed on his commute to work this Friday was 20 miles per hour.
This gives us s, however we do not know d.
INSUFF.
(2) If Ben’s average speed on his commute to work this Friday had been twice as fast, his trip would have been 1 hour shorter.
We already know \(\frac{d}{s}=t\)
Now, from this statement we are told:
\(\frac{d}{2s}=t-1\)
\(\frac{t}{2}=t-1\)... substituing the value of \(\frac{d}{s}\) from...(i)
\(t=2 \)
SUFF.
Ans B
Hope it helped.
12 Feb 2025, 20:40
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hr1212
Question: Time of travel of Ben from home to office = ?
Statement 1: Average speed = 20 miles per hour
Distance between office and home is no given hence
NOT SUFFICIENT
Statement 2: For twice speed it takes 1 hour less
For twice speed teh time should be half
i.e. Half teh time of travel = 1 hour
i.e. Time of travel = 2 hours
SUFFICIENT
Answer: Option B
