Car A leaves at a speed of M miles per hour (mph) from New York City for Chicago at 13:00 hours. Another car B also leaves from New York City for Chicago at a speed of N mph at 15:00 hours. Both the cars take same route and 1.4 M > N. Quantity A Quantity B At 21:00 hours, distance covered At 21:00 hours, distance covered by car A by car B
A. Quantity A is greater. B. Quantity B is greater. C. The two quantities are equal. D. The relationship can not be determined from the information given.
The relationship can not be determined from the information given.-ans: (d) (2nd car started 2 hours late, so 1st car would be 2m miles ahead at 15:00 hours. the gap between 2 cars would vary depending upon the difference in speeds of the cars.
as per the question, n < 1.4m, let n = 1.35 m
distance covered by car a at 21:00 hours = 8 m
and distance covered by car b = 6 x 1.35 = 8.1 m
so distance covered by car b will be more.
let n = 1.3 m
distance covered by car b at 21:00 hours = 6 x 1.3 = 7.8 m
so distance covered by car a will be more.
so for some values, 2nd car would be ahead (1.35m) & for some values (1.3m), 1st car would be ahead. hence the relationship can not be determined from the information given.)