Can you answer this IQ question?

Question

20. In a race from point X to point Y and back, Jack averages 30 miles per hour to point Y and 10 miles per hour back to point X. Sandy averages 20 miles per hour in both directions. Between Jack and Sandy, who finished first?



1) Jack
2) Sandy
3) They tie
4) Neither
5) Impossible to tell

Answer 1

2. Sandy..
although Jack would win going, Sandy would catch up and win on the return.
Ex: 10 miles race.
Jack would make the run one way, in 20 minutes. or (one third of an hour).. on the return, it would take him an hour..total, 1 hour 20 minutes
Sandy would make the run one way, in 30 minutes, (one half of an hour) and also the return in 30 minutes, total, 1 hour.
Its the same regardless of distance..
So Sandy wins.

Answer 2

3

Answer 3

5 impossible to tell because the distace is never established therefor we cannot figure out the finishing times of Jack or Sandy. For example if it was a fairly short distance Sandy might not have had enough time to catch back up with Jack and if it was a great distance she could have not only caught up but also passed him and won.

Answer 4

Sandy will always win. Jack will always come in 1/3 of her total time behind her. (So if it takes her 3 hours, it will take him 4)

Answer 5

but the most important thing u have not mentioned n that is the distance between both the point n if 20 is the distance than jack won the race

Answer 6

2) Sandy because Jack only catches up at the end.

Answer 7

the tie because they both have the same mile average which is 20 m/h.

Answer 8

Impossible to tell. Depends on the total distance from Point X to Point Y.

Answer 9

2) Sandy
Distance X to Y =30 miles
Jack; X to Y, 1 hour + Y to X, 3 hours, TOTAL = 4 hours
Sandy; X to Y, 1.5 hours + Y to X, 1.5 hours, TOTAL = 3 hours

My algebra is POOR

Answer 10

3 they tie