It's not what you are thinking

Algebra Level pending

A privateer discovers a merchantman 10 km to leeward at 11:45 a.m. and with a good breeze bears down upon her at 11 km/hr, while the merchantman can only make 8 km/hr in her attempt to escape. After a two hour chase, the top sail of the privateer is carried away; she can now make only 17 km/hr while the merchantman makes 15. The privareer will overtake the merchantman at:

the privateer will never overtake the merchantman 5:30 p.m. 2:45 p.m. 3:45 p.m. 3:30 p.m. 5:00 p.m.

Keshav Bansal by Keshav Bansal , 21, India

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