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21 Jun 2023, 01:30
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
65% (02:18) correct
35%
(02:31)
wrong
based on 162
sessions
History
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Not Attempted Yet
Otto and Han are driving at constant speeds in opposite directions on a straight highway. At a certain time they are driving toward each other and are 60 miles apart. One and a half hours later, they are again 60 miles apart, driving away from each other. If Otto drives at a speed of x miles per hour, then, in terms of x, Han drives at a speed of how many miles per hour?
A. 80 - x
B. 40 - x
C. 80 - 2x
D. 120 - x
E. (40 - x)/2
A. 80 - x
B. 40 - x
C. 80 - 2x
D. 120 - x
E. (40 - x)/2
21 Jun 2023, 02:50
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O and H are driving in opp. directions and are 60 m. away from each other, approaching each other. 1.5 hrs later, they are 60 m. away from each other and moving away from each other. So it can be said that collectively they covered 120 m. in 1.5 hrs.
So, together their total speed has to be 80 m/hr (120/1.5).
So, if O has a speed of x m/hr, H must have a speed of (80-x) m/hr. So, Option A.
So, together their total speed has to be 80 m/hr (120/1.5).
So, if O has a speed of x m/hr, H must have a speed of (80-x) m/hr. So, Option A.
Archit3110
21 Jun 2023, 11:42
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total distance covered in 90 mins is 120 m
so net speed is 120/1.5 ; 80
80 = speed of Otto ( x) + speed of Han
speed of Han = 80-x
option A
so net speed is 120/1.5 ; 80
80 = speed of Otto ( x) + speed of Han
speed of Han = 80-x
option A
Bunuel
