Bryan Yeo's answer to Joanne's Primary 5 Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Bryan Yeo
Bryan Yeo's answer
26 answers (Tutor Details)
1st
Another way is,
Dog=2xcat
For 1m a cat moves,the dog moves 2 meters
For 15m a cat moves the dog moves 30m(The total distance)
Check:30-15=15(caught)