Lionel Loi's answer to Venessa's Primary 6 Maths question.
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Assume distance to be d
Find out how much ahead the coach is before the car starts moving @ 0718 = d/10
Compare the difference of speed between the car and coach.
d/4 - d/5 = d/20
Hence the car will catch up at d/20 per hour, so it will take 2 hours to catch up d/10 = 2d/20.
Therefore two hours after the car starts at 0718 means the answer is 0918
Find out how much ahead the coach is before the car starts moving @ 0718 = d/10
Compare the difference of speed between the car and coach.
d/4 - d/5 = d/20
Hence the car will catch up at d/20 per hour, so it will take 2 hours to catch up d/10 = 2d/20.
Therefore two hours after the car starts at 0718 means the answer is 0918
Date Posted:
7 years ago
Thank you so much
Hi Lionel Loi!Thank you so much for the help!The working was so clear and I finally knew how to do the question!:)
XOXO,
Venessa
XOXO,
Venessa
No problem ☺
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