Bunuel wrote:

Official Solution:

Statement (1) by itself is insufficient. We need to know more about the second half of the trip.

Statement (2) by itself is sufficient. The car covered the last 100 miles in \(\frac{100}{40}\) hours. Adding this time to 9:00 am we can find the arrival time.

Answer: B

Hi, Bunuel!

Please clear my doubt.

for statement 1) We have the distance=100 miles covered till half point of the journey and time taken to cover this distance= 9- 7 a.m = 2 hours. So, with this information we can calculate the speed of the journey = 100/2 = 50 miles/hour. With the help of speed and rest distance of 2nd half= 100 miles, I can calculate the time required to reach point B i.e t=100/50= 2 hours. This would tell me that the person reached at B at 9a.m + 2 hours = 11 a.m.

So statement 1 should have been sufficient.

Statement 2 is sufficient since we have the distance=100 miles and speed given. So time can be calculated to reach B.

That's why I chose Option D.

Please tell me where am I committing mistake?