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TOPIC: Speed

Speed 2 years 5 months ago #1

  • JT
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Mr Lee took 6 hours to drive from Town X to Town Y while Mdm Ong took 4 hours to drive frok Town Y to Town X. Both of them started driving at 9am. What tine did the two of them pass each other?
1) 11am
2) 11.24am
3) 12.36pm
4) 2pm

Pls help with above qn. Thanks!
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Speed 2 years 1 month ago #2

  • Rex Fernando
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Since this is an MCQ, it is better to answer by guess and check method.
Lee can cross half the distance in 3 hours
Ong can cross the distance in 2 hours.
The best answer is more than 2 but less than 3 hours.
So, option 2 is the right answer.

Option 1 is exactly 2 hours, a bit short for both to meet.
Option 3 is more than 3 hours, both would have passed each other.
Option 4 is too long.
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