SEAMO 2021 — Paper C — Grade 5–6 Question 20

Question 20

At $8{:}00$ am two dogs run towards each other from towns $3600$ m apart at $350$ and $450$ m/min. After one minute they both reverse, run two minutes, reverse and run three, and so on, increasing each leg by one minute. When do they meet?

$8{:}41{:}10$ am
$8{:}42{:}15$ am
$8{:}43{:}00$ am
$8{:}44{:}30$ am
$8{:}45{:}00$ am