CSEC Additional Mathematics · 2014 · Paper 1 · Question Q20

A long-distance runner runs the first kilometre of a race in 3 minutes 45 seconds but finds that his speed drops steadily so that each kilometre takes him 12 seconds more than the preceding one. The time taken to cover the first 12 kilometres is

1. (A)58\text{ mins } 12\text{ secs}
2. (B)31\text{ mins } 48\text{ secs}
3. (C)9\text{ mins } 18\text{ secs}
4. (D)63\text{ mins } 36\text{ secs}