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28 Apr 2021, 02:45
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
84% (02:12) correct
16%
(02:15)
wrong
based on 116
sessions
History
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Time
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Not Attempted Yet
Two buses travel to a place at 45 km/h and 60 km/h, respectively. If the second bus takes 5 1/2 hours less than the first for the journey, the length of the journey is:
(A) 900 km
(B) 945 km
(C) 990 km
(D) 1350 km
(E) 1400 km
(A) 900 km
(B) 945 km
(C) 990 km
(D) 1350 km
(E) 1400 km
28 Apr 2021, 03:05
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Speed = distance/ time
Let time be t for bus @45kmph
And time of 60kmph is t-11/2
Distance covered by both buses is same : d km
45/60 = (t-11/2) / t
This gives t=22
Now to get the distance as distance covered is same d km
45 = d / 22
d = 990km
Posted from my mobile device
Let time be t for bus @45kmph
And time of 60kmph is t-11/2
Distance covered by both buses is same : d km
45/60 = (t-11/2) / t
This gives t=22
Now to get the distance as distance covered is same d km
45 = d / 22
d = 990km
Posted from my mobile device
28 Apr 2021, 03:14
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Distance = Speed*Time
Let Time be T
Let Distance be D
Bus1 45T = D
Bus2 60*(T-5.5) = D
60T-330 = D
Plug in Bus1 into Bus2 to get:
60T - 330 = 45T
15T = 330
T = 22
Plug 22 for T into
Bus1 45T = D
45*22 = D
D = 990
Answer C.
Let Time be T
Let Distance be D
Bus1 45T = D
Bus2 60*(T-5.5) = D
60T-330 = D
Plug in Bus1 into Bus2 to get:
60T - 330 = 45T
15T = 330
T = 22
Plug 22 for T into
Bus1 45T = D
45*22 = D
D = 990
Answer C.
