bhargavhhhhhhhh
Bunuel
Official Solution:
On a training run, did Jordan ever exceed a speed of 12 kilometers per hour?
(1) Jordan took less than 2 hours to complete the run.
Clearly not sufficient.
(2) Jordan covered 24 kilometers during the run.
Clearly not sufficient.
(1)+(2) If the run covered 24 km in less than 2 hours, then the average speed was above 12 km/h. To achieve an average above 12, he must have exceeded 12 at some point and for some time during the run. Sufficient.
Answer: C
Bunuel, what if jordan maintained the speed of 12kph through out 2 hours, I think it's option e, please correct me if I 'm wrong
You're missing a key detail: Statement 1 says Jordan took
less than 2 hours, not exactly 2. So if he ran 24 km in less than 2 hours, his average speed was greater than 12 km/h. To have an average above 12, he must have been above 12 km/h for at least part of the time, meaning he did exceed 12.
So the correct answer is C, not E.
P.S. All PS, DS, and DI questions in the tests are correct.